You mean like owning guns? That's exactly the case the liberals make for why our way of life needs to be expunged and we need to be re-educated. Your view of the world is egocentric and Anglocentric. Your way is not the best way simply because it's your way and that mindset is pure arrogance. The religion that you were born into or chose is not the "one true religion" because it says so. These people don't need your or any other religion and likely live in vastly better harmony with the Earth than our "modern civilization". They do not require your "salvation".
Are their lives shorter, more brutal? Probably. Infant mortality? Higher, sure. Do they poison the ocean with megatons of plastic and fill vast landfills with garbage. Nope. Are they as annoyed by proselytizing as I am? Apparently more so, since I've never stuck one with an arrow (although I've been tempted). This genius should have taken the hint when they shot at him the first time. Now he's native poop. So be it: play stupid games win stupid prizes. The moral of the story is: your religion is great for you, keep it to yourself.
Interesting anti progress statement wrapped up with a hint that wanting people to progress is somehow the same as wanting people to not have guns. A bit of "to save the planet we should all go back to the caves" type statements. You also try to throw in some of that current "white guilt" stuff for fun, and as far as the religion digs, I'm pretty sure they have one, probably some primitive one like most ancient savages had. Not all primitive religions are immediately compatible with civilization without a bit of evolving and re-interpreting which you'll notice most of them have done in order to progress with the course of human advancements. Usually the first thing that has to change is the kill everyone else parts which have to get toned down a bit. Usually when the religion runs into the fact that the "others" can kill them wholesale then the religion suddenly starts preaching that you don't actually always need to kill all the others and some solution to live and let live for the most part is arrived at.
Your entire life and everything you take for granted revolves around the fact that most of the world has greatly evolved in customs, culture, intelligence, knowledge, civilization and codes of acceptable behavior. Most of which involved those that did not want to join in, having it explained to them with force that they must at least meet a certain level of civilization and respect for the lives / livelihoods / property of others or they would be brought to heel. This happened all over the world regardless of race or religion, in ways that at first were setup by the local group and then from there by influence as groups / cultures collided and fought till they came to an understanding / pecking order / society.
Owning / Not owning guns has nothing to do with my point at all and to try to throw that is kind of odd to say the least.
More evolved people often have more evolved weapons and understand how to use them and when not to use them.
Having Guns makes being civilized way easier. Where the restrictions come in is that you have to understand that your rights do not allow you to abridge the rights of others. So you can have a gun, carry a gun, use a gun as needed. But you can't go using your gun to threaten, kill, rob, terrorize, or annoy other people going about their lawful business.
Having a gun and knowing how to use it, makes it much easier to be more civilized and progress faster.
Eventually guns should wind up as antiques much like bows, arrows, swords, spears, slings and many other such things are, as the human race develops even better weapons. Especially once you develop ones that can reliably stop an attacker without having to kill them if you don't wish to do so.
Leaving some group to wander around as unevolved savages is not doing them any favours, it's simply having them be a human zoo for your own interests.
I'm pretty sure if you were to undertake to bring them into modern civilization, eventually they would come to see the advantages of it & I doubt their children would have any interest in living like animals except as possibly school trips etc.
It's the common "noble savage" myth that people a bit too far away from scratching a living from the dirt with a rock, fall prey to.
You may be happy to leave isolated groups of people to live like animals and be evolutionary dead ends, but there are others that are interested in making their lives better and helping them to join the modern human race while still being proud of their heritage.
As far as your claims about pollution, it's actually specifically because we need to force a few countries such as China and India to become more evolved that we have a lot of the problems that affect the oceans on a global scale. Landfills are not specifically a problem, you just have to run them correctly because all you are doing there is basically doing artificially what happens on a longer open time scale.
With a bit more human evolution and more evolved attitudes (which currently are being hampered by vested propaganda interests), a lot of the waste can easily be solved, without hampering anyone's ability to have a free and constantly improving life.