It’s more about the what the color of the bubble symbolizes. When you see a green bubble, you know you are losing features when communicating with this person - the nice link previews, the reactions to individual messages, threading, mentions, and various other iMessage tie-ins that people have.

In a one-on-one conversation, it’s not the biggest deal…but in a group text it is a massive loss of functionality, enough to make people set up separate group texts with only iPhone users to restore the lost functionality when they don’t need to message the non-iPhone users.