If words don't matter, then ignore the edits. People tend to copy what they see. If they see it written with the original definition, maybe that's what the hivemind will adopt. I don't see a problem with that and I don't see the point in attacking people that care. I'm sure you have things in your life you care about.
No, the point is words do matter, and they mean what people think they mean. Not people from 100 years ago from a prestige university who wrote a dictionary. Languages are fluid, they change and when they do change the present reality is the way the language is spoken.
Obviously there's no universal agreement on which phrase is correct. Otherwise, we wouldn't be having a discussion. I don't know how many people we're even talking about. I'm certain the group that uses "comprises" instead of "comprised of" is not entirely "people from 100 years ago from prestige university who wrote a dictionary."
I understand languages change, which I think is an argument for the edits. If the language pivoted one way, pivoting back is just as valid a change as any other. "Comprised of" and similar phrasing doesn't come out of the ether. They build in popularity as they propagate through writing. There's a big snowball effect. I suspect going forward, you'll see "comprises" or "consists of" because people just copy what they see. Most don't have a strongly formed opinion about which phrase is better.
Personally, I view writing as a craft or skill like any other. Writing is different than speech and always has been. There's a huge qualitative difference in text that has been edited and text that is streamed out of someone's head. The former is almost always clearer to understand. Consequently, if someone points out a grammatical issue to me I say "Oh, TIL, thanks for letting me know" and then I adapt and go on with my life. My bias is to the established norm, not arguing that I'm riding the wave of a linguistic revolution. If I have an open question on something, I'll consult an established resource, just like I would in any other field or craft.
I think the problem is people get embarrassed when they're told they're using the language incorrectly. I get it. I've been there. It's true that English does not have a governing body like French, but I don't see that as a compelling justification for redefining terms or just arguing that nothing can ever be wrong.
