Implying that the only people who use mixers are doing something illegal, which isn't true.
I did not imply only. I wrote ie. but your point is true. Mixers are available for everyone to use just like Bitcoin is for the 100% to use it in the way and with the method they want.
Before making a deposit from mixed coins, people must do research about rules about mixer, AML, etc. in ToS of that service. If they have rules against coin mixing, don't make deposit with mixed coins, you will take more risk by doing it.