vs
"You don't speak for me"
One of those comments is speaking for a lot more people
It's "I can tell you that to us you're all the same" vs "You don't speak for the ~7.7B people not in the US."
One person is trying to speak for 7.7B and the other is advising against that.
It was an example of how to state unambiguously who was/was not being spoken for to contrast with the other statement. Maybe because I put it in quotes led you to think I was quoting someone, but it looked odd without to me.
vs
"You don't speak for me"
One of those comments is speaking for a lot more people