Coinjoins are not "very select parties" where 10 people are "specifically chosen" to attend. It's the exact opposite: Coinjoins are open parties where the dancers specifically choose which party to attend.
If they are allowed to enter. They are public parties you can freely enter if you fulfill the requirements of their co-host. The co host checks your clothes, your date, how much you weigh, how your hair smells, and the color of your eyes. If everything is OK, you can come in. Our partners will keep a close eye on you though. If we notice something iffy about you or something we don't like, you aren't coming in to our free public party. The co-host is a symbol for Wasabi's blockchain analysis partner.
That's a pretty close metaphor, but the only thing the co host can do is glance at a people who walk through the door to see if they look identical to any mugshots of the "most wanted" criminal list posted in the town square.
A centralized mixer is just someone else's wallet, it does nothing ensure fungibility or privacy because they are able to deanonymize their customers.
What someone
is capable of doing and
what is doing are two different things. If a mixer has gained users' trust, and indeed does not share the data, I don't see where's the problem with considering it privacy respecting.
The problem is that the "trustworthy" mixer gave 7TB of user history to government raiders. This is why Wasabi is designed not to collect any data whatsoever, a government raid of any coordinator would do nothing to affect the privacy of its users.
Coinjoins are open parties where the dancers specifically choose which party to attend.
So solve the mystery:
- Wasabi team thrives to bring fungibility as they say.
- Wasabi team runs a coordinator which treats some inputs differently than some others, practicing blacklisting.
One of those must be false, otherwise Wasabi team contradicts themselves.
Wasabi brings privacy, privacy brings fungibility. Non private coins are not fungible until a coordinator chooses to make them private. If no coordinators want to make your coins private, then coordinate your own coinjoin and restore the fungibility yourself.