Because Polestar isn't a household name in the US. Most people have no clue they are even selling Polestars here. Volvo is very well known brand that has been established in the US for many years. and most people don't know it's Chinese-owned now. If someone said "ban Volvo" people would actually stop and wonder WTF is going on. You say "ban some brand of Chinese EV that you've never heard of," people aren't really going to care that much.
I still don't know anybody who gets good 5g service anywhere. It seems like total shit. I know multiple people who have tried 5g home broadband and its slow and intermittent garbage and they sent their equipment back.
Time for all of the crossover drivers to admit that they are also part of the problem. They aren't safe just because they are somewhat better than some jacked up bro truck.