But then other scientists examine that evidence, replicate the published experiments and try to recreate the results. If the evidence is faulty, the peer-reviewed results will discover it. At some point, someone else will probably find another, valid, explanation and that will gain more traction in the literature. The original flawed data will be marginalised and eventually forgotten. It doesn't matter what the first scientist's motives were; the science will correct itself.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'