Those kinds of statements show a misunderstanding of both the studio and how the games industry works. Any one of those engineers could have gotten into a FAANG the traditional way and doubled, if not tripled, their salary on arguably less involved problems than what they go through creating a real time game.
Its also likely why Schafer chose to take the studio back rather than go the route of finding a new publisher to work under. He still wants to work on games for a little longer rather than get a last paycheck and retire early.
And yes, no one expects a brand new IP to have the same odds of success as a old IP that's become a cult classic. DF's strategy and directions were not to make the most profitable, safe release because that's not why you buy a studio like DF.
Despite that loss leading strategy, Obsidian has had quite a few other releases that did to make up for that side project. So the studio would overall be in the green despite that.