Everyone is going to like what they like. If I have an M4, I'm not going to review the 1301 favorably. If I own an 870, I'm not going to recommend the M4. This will be the usual response you will get on any forum.
However, I'm of the belief, that you should own multiple shotguns, so that you're not missing out on anything. I might own an 1100 and an M4. Both do their jobs very well but they both do different jobs.
Shotgun are indispensable.
That’s called bias, and most people are based on what they have like they’re offended that someone disagrees with there personal choice. Not everyone is like that though, and some people are even outright nerds that have to try everything.
4-5 years ago I walked into Gander Mountain when they were going out of business and that day I spent nearly $30K there. The majority of that money went to shotguns, here’s a list of what I bought that day:
Beretta 686 Silver Pigeon 12ga
Beretta A400 Xcel 12ga
Benelli Supersport 12ga
Benelli Supersport 20ga
Benelli Montefeltro Silver 12ga
Benelli Montefeltro Silver 20ga
Benelli Ultralight 28ga
Benelli M2 12ga
Benelli M2 Tactical 12ga
Benelli SBE3 12ga
I shot all of them, most of them a lot. It wasn’t uncommon for me to shoot a case or two of clays a day in my back yard. When I moved they all got sold along with almost all of my other shotguns except a couple that have sentimental value. Why? Because I decided that the M4 does the role of every one of those shotguns in one package. The only one I miss a little is the A400, that was one sweet sporting shotgun and cycled everything.
You say someone who likes the M4 wouldn’t review a 1301 favorably? Bullshit. I think it’s a great shotgun, I’m even on the wait list for one right now and have been for almost two weeks now. I have a use for it, but are they as reliably and tough as an M4? Hell no.
The M4 is the ultimate tactical shotgun. Period.