Didn't US and FATF pressure other nations into giving up 'hiding money' through threats to cut them off from the US or partner financial systems? What happens

Didn't US and FATF pressure other nations into giving up 'hiding money' through threats to cut them off from the US or partner financial systems? What happens if some coin and its developers have no interest in being connected to the US financial system -- it seems like then there would be limited ability to influence them and off/on ramps would still exist through criminal networks (and the mere presence of an on/off ramp lends USD/"X" pair value, even if the person using "X" doesn't use the ramp).