To be fair, I’m sure it would cost quite a bit of money to change all the US flags. We’ve got them hanging everywhere, including other countries. That said, I don’t think the flags having to be changed is enough of a reason to deny Puerto Rico statehood.
https://en.wikipedia.org/wiki/Puerto_Rican_status_referendum,_2017
EDIT: Damn, I got pushed to the next page; now it’s not as clear what I’m replying to :c