I don't know him well or his history so I won't comment on that out of my own ignorance.
I can respect people attempting to make something shitty less shittier or fighting the good fight. But I personally rather just use a better tool not an inferior work around. Something that was made for privacy from the ground up and has the ability to keep improving. Bitcoin fails on both of those counts in respect to on-chain privacy. It's still using optional privacy tech from over a decade ago when we're already in the age of ZK.
It's fine if someone says they don't value the trade-offs that come with privacy on a protocol-level for Bitcoin, fair enough ok, but then don't be dishonest and pretend like coinjoins "solved on chain privacy" or are just as good (or better) for privacy. That's pretty dishonest.