If that's true, why are replication rates so poor?

There is no feedback post publication. Researchers are expected to individually decide on the quality of a published study, or occasionally ask the colleagues in their department.

I don't get the impression that low replication rates are due to malice generally. I think it's a training and incentive problem most of the time. In that case just asking should often work.

Science has very little feedback and lots of filtering at present. Preregistration is just more filtering. Science needs more feedback.