The line between constructive criticism and something less useful is sometimes very thin. And I doubt that anyone here is employing a separate editor that asks them if they want to reconsider sentence #2 in paragraph #3, before they post.
So mistakes are gonna happen.
Moreover, in any kind of environment where people are expressing preferences, you get a not inconsiderable subset of people that aren't in a position to make constuctive criticism--even when they try to do so. They know what they like or don't like, but not why, or how to fix it, etc.
I'm fairly certain someone got ticked at me last week because my attempt to explain why I thought 5E doing what they said it should do would not get them the preference they expressed. Probably, I could have said it better. But you know, it wasn't that important. I made a good faith effort to point out a flaw, in the time I had to do so, and moved on. If I'm correct in my assessment of the situation, then their communication wasn't terribly constructive, and my attempt to make it more so didn't accomplish a whole lot, either. All we managed to communicate to WotC, if they bothered to read that, was that there is some confusion on the topic. They probably knew that already.
Furthermore, I'm becoming increasingly convinced that "edition wars" are not about editions, but convenient proxies for other conflicts. Asking 3E and 4E fans to get along better sounds more easy than it is, as if asking some of the third world proxy conflicts during the cold war between the western developed world and the Soviet bloc was entirely local. If those two small nations in Africa would just quit shooting at each other, everything would be fine.
Fans of 3E and 4E that aren't caught up in playstyle conflicts or mad at some company or any number of such things--already
get along just fine. Some of them even play both. And a great deal of the ones that seem to not get along are doing mostly ok talking about serious differences in playstyle and such, but because of the sharp disagreements find themselves drug into these proxy conflicts on a regular basis.