Some people think communication mechanisms shouldn't enforce policy. They don't want their phones automatically disconnecting if they talk to a friend about illegal or immoral things. They don't want their TVs shutting off if they watch stuff that's politically unacceptable. So it follows that they don't want their money throwing an exception if they try spending on an transaction too unsavory for Stripe or your bank.

Free speech is for all the stuff you personally detest and personally choose to avoid. In a free country you hold your nose and allow others to engage in it.

If money is speech, then having a kind of money that doesn't pass through policy gates is an essential component of a free society.