... because they aren't. If they were, we'd all be using them instead, and the higher priced scopes wouldn't exist.
The problem isn't with people that own high end scopes, or people that own low end scopes. The true problem is that people are content forming opinions, and passing those opinions on, with very limited experience. Those that can't afford or choose not to own expensive scopes can always be found badmouthing the high dollar stuff and the "lack of need" for them. Those that have only owned one or two high end scopes can always be found badmouthing lower end scopes, and any high end scope that doesn't wear the same logo as the one they bought.
What I'd like to see is for people to stop offering "advice" when their experience is severely limited. Just a couple weeks ago, I had a guy tell me that his Leupold MK4 from 6 years ago is still the best riflescope in existence. It wasn't open for discussion. He had absolutely no experience with any of the other top brands we all know today. He is the "gun guy" among the people he shoots with, and he hands out this "advice" with a certainty that he is correct.
So what leads people in this sport to hand out so much "advice" when it can be proven they have next to zero real experience with competing products? I know people on this forum personally that do the same things. When did it become acceptable to advise others when we have no experience? When did it become so important to sound like an authority on something, when we're not?
Take the mid-range scopes, like bushnell, vortex, IOR, etc... put them in the same room with TT, S&B, Steiner, Nightforce, etc. As many of each as required. Then bring in 100 people, and tell them that they must use each scope for 1 hour, and then choose their favorite. That favorite scope, would be theirs, for free. Would you tell me that people are going to be choosing HDMR's or Vortex PST's and Razor's instead of TT, S&B, or Steiner? I seriously doubt it. They would be choosing the high end scope of their dreams, that has all the features they've always wanted.
My point her is when you remove price from the equation, the truth can be seen. The expensive scopes have more features, better glass, and more rugged components. The true question is whether or not that is worth it for the end user. If you can afford it, and you demand more of your gear, then it is. If you cannot afford it, or simply don't demand that much, then it is not. However, to say that the need for them does not exist, is to appoint yourself king of needs, and decide for others what they desire. Yet need, has very little to do with most of the purchasing we do. Desire on the other hand, has a great deal to do with what we purchase. A good shooter can probably accomplish more with a toilet paper roll and some string through it than a poor shooter and a $4000 scope. That doesn't mean we should use a toilet paper roll as a point of pride.
Instead, these choices should be made like any other choice in our life. We decide what we require/need, and then we decide what else we want in addition. Then we see how that matches up with our financial situation. For some, compromises must be made. For others, no compromises are necessary. If compromise is necessary, then that does not automatically degrade the quality of the options which are out of their price range.
Yet there can be no doubt that the performance delta between different price-points gets narrower as you reach the top. This is true in everything, not just rifle scopes. You end up paying a lot for that last little sliver of performance. Yet if you desire it, and can afford it, it can be yours!