Crypto regulation is not the main problem on why mixer was banned. Mixer banned was implemented after popular mixer such as Chipmixer was seized due to the involvement on money laundering with NK hacker.
Chipmixer was heavily promoted which might involved the forum if they allow services that connected to illegal activities freely advertised here. There’s no way the decision will be reversed just because Trump is pro Bitcoin since the issue here is not Bitcoin rather the use of mixer on money laundering although mixer in general is not bad.
I understand the idea that the forum does not want to become a platform for advertising suspicious services that are engaged in scams. But banning absolutely all mixers on the basis that some of them were engaged in such illegal activities is very unfair to those services that do not do this. Some casinos also deceive their users, do not allow them to withdraw winnings and much more. But they are allowed to advertise on the forum. That is, the logic here is quite ambivalent, in my opinion.
It’s a safety precaution since there’s most of this large scale money laundering is always happening on mixers while casino is openly countering it with KYC. Mixers promotes privacy which is why they don’t have any means to comply with the law.
You can consider those mixers that operates properly as collateral damage since they don’t have any control who will use their mixer. This their main issue which they can’t resolve unless they will start to apply KYC on each user to track the culprit launderer easily and help authorities.