Think about it...you dedicate your life to your science, and grind day after day, year after year with no verifiable results, because, you know, in case you haven't noticed, curing cancer is motherfucking hard.
I can see where maybe at some point, you just want to feel some sense of accomplishment or to be noticed in your social group, so you find some questionably-causal, but statistically-relevant piece of research you did and just publish the damned thing.
Don't get me wrong, I find this sort of thing appalling, but in the end, most of us are fairly imperfect people.