Since Bitcoin relies on PoW, banning PoW effectively bans mining Bitcoin. On the surface, why that would make Bitcoin more popular is nonsensical, but I see two interpretations, and I’m guessing you mean the second one:
1) Banning PoW mining in the US, like they did in China, severely limits industrial-scale Bitcoin mining in another big part of the world, lowering the total mining incentive, and moving mining out to places where people don’t object to it and where electricity is cheap and in excess: this somewhat lowers the total hash rate, conflicts less with our growing energy demand in populated areas, but more significantly makes the environmental cost more abstract to people and thus easier to swallow. It’s a lot more upsetting to see a power plant down the river mining Bitcoin than knowing they come from somewhere called “the cloud”.
2) Banning PoW mining in the US could somehow incentivise towards a PoS transition, like with Ethereum. I don’t see that happening for Bitcoin. Sorry.