Tenured academic jobs are usually easier and often pay considerably more than private sector jobs.
And it's not a "fraud". It's a field that reached a conclusion with a very high degree of uncertainty. The conclusion is true. There's a real phenomenon. It either means a lot or a little.
Then billions were taxed and spent by power-hungry people based on the possibility that it means "a lot". If it means a lot, then that opens the door for power-hungry elites to micromanage the lives of everyone else, just like they've always wanted to do.
Scientists are incentivized to hype one side versus the other. The high degree of uncertainty allows for a defense of any particular claim. If you want to study something, you can make a defendable claim, raise the alarm, and often get funded to study it.
No wacky insidious conspiracy needed. (But people "conspire" all the time. They discuss a how to present ideas. It's an ordinary thing to do.)