Of course, this all seems a bit tragicomic, because what they are trying to do is centralize Bitcoin as much as possible to supposedly prevent illegal transactions. What seems to me is that the main reason for such actions is not ordinary users, but they are most bothered by transactions involving those countries that the US has under sanctions.

Given that Iran is currently the number one enemy of the US (which is actually ridiculous in every sense) - and the fact that some of their companies use BTC to avoid sanctions leads me personally to think that such moves are aimed at such countries. I recently read that Chinese miners are moving en masse to Iran, which has even cheaper electricity than China - and that they have already caused very serious problems with power shortages across the country.

I also think that US miners cannot do any serious damage on their own - but if their idea starts to apply in some other countries than some transactions could have problems with confirmations - at one point we could really have two types of miners - independent and those who would work according to state rules.