mixers and tumblers are mainly used by illicit sourced funds..
I don't take the time to get involved with you anymore, but you're prohibited from derailing this thread. Mixers are not used mainly for illicit stuff. Evidence supports otherwise. Chain analysis (if you took the time to actually do "tHe ReSEarCH", as you say), has noticed a less than 10% being sent there illegally. Hopefully, the same percentage of people who agree with your "moral standard" of what should the users be free to do.
Bitcoin mixers aren't regulated so that's the reason they'll be used for predetermined money laundering by lawbreakers.
Sure, no disagreement. You can't regulate everything, so criminals will always be attracted to beating around the bush.
Let's say the source of your funds are clean but do mixers make the process of concealing the funds' origin legal?.
I'll need a little bit more context. If you're asking if it's legal to conceal the origins of money, then it depends on the country and the manner you conceal it.