I will avoid stretching it but it almost sounds like people are going to scam anyway so let's make some money by supporting them, doesn't it?
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If scammers use Monero and get away then we have to look towards it, but that does not mean we should start supporting scammers by promoting services that facilitate them, because they will eventually find a way.
Actually no, it's not like that. People should have the chance to slam the door in the face of anyone invading their privacy or trying to sneak in their private lives. It's the purpose of the entire work of Cypherpunks. Bitcoin follows their vision. If a law enforcing agency is surveilling the citizens, it's legal, right? But if you sneak in on your neighbour's private life is illegal right? Wrong. Actually yes, if an agency does it then it is legal and if a person does it then it becomes illegal, but in both cases it means invading someone's privacy and this is unacceptable. Mixers help honest people preserve their privacy. Criminals will always find a way, no matter if with mixer's help or not. They do that for ages. Simple people, which have or not anything to hide, but nothing illegal, use mixers for their privacy. For not allowing intruders in their lives. For being able to slam the door in the face of any intruder.