I agree with that this method seems far easier to catch the majority of people committing those crimes, since the cultivation process would most likely be non-trivial, so the "casual" criminal wouldn't have access to it.

There is still the problem of someone else doing the cultivation, so one mastermind could create a militia of people immune to the checkups. (I'm not quite sure if this is actually possible though, although, superficially at least, hypnosis seems to do this sort of thing)

(Thanks for the "cultivating deliberate unawareness" term)