This graphic gives a sense of it.
On the one hand, it's difficult to sympathize too much given that tenured academia is deeply insulated from competition compared to almost anyone, anywhere. On the other hand, competition for tenured positions has become very fierce in recent years. That seems to be what is driving this kind of thing.
There's another aspect, too, which is implied by the need to publish unlikely novel results before getting 'scooped.' If you're hanging your hopes on them, it's also necessary to defend their plausibility so you continue to be important as the discoverer of them. Thus, science becomes deformed not only because scientists are inclined no longer to carefully check unlikely results, but also because they have an interest in using anti-scientific strategies to defend implausible results long after they should be rejected. They might use rhetoric to try to silence criticism ("You're just opposed to my results because I'm [insert protected category]!"). Or, as the Michael Mann case suggests, they might even resort to legal strategies to defend highly questionable science.
After all, one's career is at stake. Or one's hope of ever having a career.
