QCs are completely unsuitable for reversing hashes and that is what cracking passwords needs.
Translation: we don't currently have a quantum algorithm for reversing hashes. But there was a time, not that long ago, when we didn't have a quantum algo for factorization either.
However, I don't expect to see a quantum algo for hash reversion any time soon, because the whole problem of reversing hashes is pretty complex.
Factorization as a classical problem is essentially trivial, in that there are very simple classical algorithms for it. They just take a lot of time to run. But coming up with an efficient quantum algorithm was not trivial, and the algorithm itself isn't so simple. So you can estimate that a quantum version of any algorithm is a lot more complex than the classical counterpart.