They are rejecting a source of good revenue by blocking those transactions.
They are protecting their revenue by implementing blacklists, not reducing it.
It's a trade-off. They rejected a source of good revenue to protect themselves from getting into mix-ups with the government.
If they are unable to run a censorship-free coordinator, then the correct thing to do would be to shut down their centralized coordinator and work towards setting up decentralized ones.
That's a good solution, but you can't tell a centralized entity what, and what not to do. We can express your opinion, or tell our fellow users to stop using Wasabi, but it would be laughable to expect that we tell them how to run their business.
Instead they opted to sacrifice their users' privacy, enforce the nonsense that is "taint", and attack bitcoin itself, in order to protect their own income stream.
Instead of telling them what to do, show them how it's done the right way. Why not fork the coordinator and have it accept all transactions.