I think you are confusing the idea of individual people's incentives with the community as a whole. Just as in our society individuals may have an incentive to

I think you are confusing the idea of individual people's incentives with the community as a whole. Just as in our society individuals may have an incentive to do nefarious deeds like robbery or murder, but society as a whole has an incentive to stop it, so it is with science. And having checked your link, A) the person's theory was overhyped and B) a meta analysis brought it back to earth. Which is evidence that the process of scientific inquiry works. That's why we know that climate change exists, despite deniers, and that vaccines don't cause autism, despite anti vaxxers having been inspired by a now retracted paper that said it did.