So if I said “I don’t like 5E because it requires that I punch my friends in the face” and then you followed up with “It doesn’t require you to punch anyone”, do you think it would be reasonable for me to say “I’m entitled to my opinion!”?
That’s more what’s happening here than anyone saying your opinion is wrong.
Right. Punching someone in the face is a perfect analogy for not having structured rules. Being told that things I say are incorrect when I'm just stating an opinion or use an imperfect example because people rarely actually share any concrete rules, that because I have a preference it means I'm criticizing people or games that are different. Of course I can't say "I wouldn't want that" because I haven't played a dozen other TTRPGs so I can't have an opinion. I get tired of repeating: this is my opinion and preference.
Some people want a metagame so they can make decisions based on that metagame knowledge, that D&D lacks support for that pillar of the game. Personally I think D&D is better off not trying to be something it's not. I don't want rules for romance or intrigue even though those things happen often in my games. I don't want "true love" to be some kind of supernatural power unless it makes sense for my specific plot and story arc.
P.S. if people want to give a concise overview of how other systems work - great! Maybe start a "plus" thread on how to implement them in D&D. Start a discussion, publish it to the DmsGuild.