Not gonna lie, Mixer is very helpful to me ever since I join the casino signature campaign and earn some Bitcoin because the local exchange the I use frequently to received this funds is very suspicious and doesn’t allowed deposits from casino or from any wallet that has a connection to a crypto casino transaction.
I encounter an issue in the past about this that makes me more cautious and embrace the use of mixer to hide the trace of gambling activity to my Bitcoin. I stop using mixer after the multiple seize on popular mixer and decided to use P2P exchange instead.
This was the reason why my account in a local exchange got banned: the funds came from a gambling platform, and it is a substantial amount back then. I asked for the reason why they banned my account knowing that these coins I received may very well come from different origins, but they never answered. I never used a mixer to 'obfuscate' my traces, but I did use Binance to trade my bitcoins to XMR or any other accepted coins of another local exchange and I never encountered such a problem again.
I see why people would want to use mixers, though the risk of getting your coins washed with some other tainted coins is very high, which may implicate you to some crime you did not commit. This is why I avoided using mixers even though the idea fascinated me before, and boy was I right after seeing news reports of people being questioned on where their coins came from after using a mixing service and getting tainted coins on their end.