But if mixers are used 90% for illegal purposes you have to see the thing a little more ethically no matter how much you like privacy.
Please read my previous replies. As I've said multiple times in this thread, the majority of coins passed through mixers are entirely legal.
Go and watch this presentation from Chainalysis: https://register.gotowebinar.com/recording/8980410054773689612 (you can enter any details in the the name and email boxes, it is irrelevant). If you don't want to watch the whole thing, skip to 37:12.
Only 8% of mixer activity is stolen funds. The majority of funds come directly from exchanges.