Would I talk like this in real life, butting into a conversation I'm not a part of, offering my opinion that nobody asked for

That’s not super fair to yourself - makes me realize we all have special privileges here… we’re all not part of 99% of conversations yet we’re all welcome to become a part of about 100% of conversations anyway.

BTW I think of our behaviors as drivers as somewhat analogous.

When was the last time somebody cut you off in traffic?

When was the last time somebody cut in front of you in a grocery store?

Spend an hour in traffic, spend an hour in a grocery store… experience entirely different parts of people. A cage (car) and removal from direct interaction (internet) both change our psychology ever so bigly.