But, well, at least crypto owners have the illusion that they are making use of their crypto funds.
Well, it's not the illusion, as they are indeed using their crypto. I think its the other way around: the other side is fooling themselves, thinking that they accept crypto if they are using some 3rd party payment processor instead accepting crypto directly, peer to peer. Then again, I completely understand businesses being reluctant to accept crypto directly as they still have to pay their suppliers in fiat, meaning they have to deal with conversions. And then you have to add volatility factor, which is not negligent when you have bunch of financial obligations each month.
This change won't come overnight, and ~10 years is basically overnight when we are talking about disrupting current system.
Sadly it is going to take a lot to change that. It's just a question of numbers and money. The larger countries have more of both so they get the love and attention so to speak.
You can even see it in smaller countries throughout the world. The bigger ones with more money get more attention from banks & other financial institutions.
Obviously the ones that support funky things like Panama and The Cayman Islands are exceptions to this, but for the most part money talks....
Another factor are regulations, which developed countries in western Europe and NA don't lack of, and that's what these card issuers (and exchange) like to see when deciding where to expand.