I'm not sure how exactly Steam pays local taxes, be it a Canadian third party that siphons the extra money for them or if they just send each region the tax money, but either way the money is flowing abroad at some point. Then there's individual transactions. If you need to internationally send someone money and the payment processors say no for any reason, you're largely SOL. I guess you can mail cash directly, while that still exists. But my point that you can basically only go either through Visa/MC or through crypto stands, even though I don't particularly love either.