Its use is offering a level of privacy that is at least as good as the one a credit card offers. On the Ethereum blockchain anybody you transact with can see your transaction history.
No, this still isn’t a valid use.
Cash cannot be so easily laundered as literally sending coins to an address and waiting a few minutes. Laundering cash requires physical infrastructure which can be tracked and monitored.
People like you are why crypto is dying. Not everybody needs to anonymously buy drugs online. When non-crypto bros here things like this they mark you and your project as criminal.