Bad quality work is a much bigger problem than dishonest work. Systematically well-done research with fake results or data is much rarer than just... lazy bad science.

There is a massive incentive to publish. Inflate the value, inflate the results, and stretch out projects to multiple smaller papers, fake results to make it seem important. This is lazy and fast, and can be caught by a stricter review and scrutiny.

Papers that are properly done all the way through, but with faked data meant to push an agenda, can be disproven by counter research.