> I do wonder how much of this is due to poorly aligned incentives causing researchers to error on the side of what will get the most attention versus researchers in general simply being sloppy.

I think we should also consider the possibility that some of it might be ideologically motivated.

For example someone who thinks people shouldn’t eat red meat due to climate change, animal rights, etc. (and who possibly belongs to a social circle where such beliefs are popular) might be motivated to fabricate results that could convince some people to eat less red meat (hypothetically, not saying that is the case here).