Alternatively, just use a privacy coin and skip all the work and fees associated with using bitcoin mixers. XMR is one of the best options considering the high trading volume and fairly stable price.
That's a turn around, and not necessarily enough
Sometimes you want to buy bitcoin. More adoption, there are more ATMs and more exchanges that accept it. And you want to clear your balance from your name, so a bitcoin mixer will do the job.
Xmr is also becoming illegal in some countries. Mixers aren't illegal yet, as far as I know.