It defies belief how much some demographics care about this stuff, I didn't believe it when I first heard either. Some of it is improving with RCS but its got a ways to go.
Does it justify their reason for hating on Android/green bubbles? Of course not, but that's 100% the reality of the situation.
That's not the main reason I went with another one, but I still paid attention to how many group iMessages we were in with lenders, seller's realtor, or just me + wife + realtor. Things really did come down to the hour during negotiating and closing, so it might've mattered.
I don't live in such a bubble, and whether or not somebody has Apple or Android is not something I have ever heard an adult bring up as a serious thing. The most I've ever seen is as an observation about why some sort of thing in a group chat didn't work, but then everyone moves on with their day and the chat continues with the types of text and media that do work.
Outside of that exceptional case, I don't think much about what phone other people have, but I personally want the phone that won't break group chats I get added to. Only about 75% of my friends use iPhones, but there's still a decent chance a group happens to be 100%.