While some will try to do everything the legal way, the the wily people who believe they are getting away on some kind of technicality sometimes find themselves charged with a different crime, or maybe just unlucky after a pre-dawn police raid or traffic stop goes south.
The idea isn't necessarily to de-anonymize the transactions here but to disincentivize people from using mixers. Either a haircut kills a portion of your value, or you lose it all, the idea is you won't do that again.
That doesn't change that legally it still kills all your money, and creates a liability on the person who put in the dirty money. If you figure out who they are it's all you, you're welcome to sue them. If not, you've learned a hard lesson.
I'm fine with either.
You're not solving the problem, you are just introducing new problems that affect other people in the hopes that the entire system becomes unworkable.
The threat being considered in this thread is a future crackdown on bitcoin and how the blockchain may be used against bitcoin owners. Legal threats seem very relevant.