"caved to the blue bubble pressure"

As an Android user, I truly don't understand this "pressure". I exchange SMS/MMS with various users, some Android, some iPhone. I am in group chats with both Android and iPhone users. I feel there is no major issue. It's interoperable. We all see each other's emojis/photos/videos/etc. There are only minor technical rough edges: for example an iPhone's user emoji reaction sometimes (not always?) shows up as separate text instead of the emoji appended at the bottom of the text bubble... And I am pretty sure videos are sent in a lower quality. But is any of this really enough to cause a "blue bubble pressure"?

I asked ChatGPT to explain but only got this vague answer: "Group chats with a mix of iPhone and non-iPhone users can be less seamless (e.g., lower video quality, no read receipts, or issues with group chat features)."

I had to open my texts to check: I indeed have read receipts when texting Android users, but not iPhone users. And this is funny but up to this very second, I had never noticed this difference... because, at least to me, read receipts is such a minor feature that I rely on very infrequently.

This leaves me still as perplex: why the "blue bubble pressure"?