It is funny how times change. At one point, mixers were celebrated as the harbingers of liberty and privacy on the forum. Yet, the way that they started to be used  to obfuscate the origin of a Bitcoin has led that to change completely. The origins need to be obfuscated so if ill-gotten/ hacked BTC is to be cashed out, you eventually need to go for a CEX which will probably need KYC.

With the ban, i suppose there is little to support that cause anymore.

Mixers would have been a good idea in a world where you only used it to hide your tracks for the sake of privacy. Yet, i think few people do it to keep it that way. On top of that, if one really wants to maintain anonymity, it can still be done if you do P2P transactions/ trading only.

As far as the question that whether we need bitcoin mixers, i think those who use them will continue to use them. Its just sensible for the forum to stop association with them because of the nuisance the criminals create with them.