Exactly, but BTC is supposedly the currency that is for wealth protection, which it turns out to not be if the fungibility problem is not addressed.

Although in the fiat economy it's different, criminals mostly deal in CASH, and probably 95% of bank transfers are legal.

In Bitcoin almost all Bitcoin are tainted to some degree, unless it's just newly mined and sitting in a miner's account.

So the fungibility problem has to be fixed.