No, we don't need.
People who trust mixers, how do you know there is no logging your ip and input/output addresses on backend?
You trust message "Anonymous/Privacy" on their website?
If even "the most private and anonymous" Proton mail working with police...

Can anyone explain, there is any chance to use it in btc mainnet?
There is any vulnerability addresses in blockchain that can be hacked with kangaroo ecdlp solver?
Or it's nearly impossible to retrieve private key only from public key and outgoing transactions?