If all you care about is keeping your Bitcoin private from the people you spend it with (even if you forfeit control of your money and data) then why don't you use a Bitcoin exchange instead of a mixer?
Because, almost every exchange I've known cooperates with blockchain analysis firms, and tries to de-anonymize every activity related to you.
But, using a decentralized exchange (like Bisq) to do BTC <-> XMR swap may not be a bad idea.
The tl;dr is that it's a lot less effective and more expensive.
Or Samourai Whirlpool, and soon, CoinJoin Splicing using the Lightning Network which could probably be more private than Monero if it reaches a larger anonymity set.
Plus instead of debating again and again that goes nowhere, why not open a topic/guide that compares different CoinJoin wallets and illustrate the pros and cons of each? That would be a more constructive solution, no?