The barely informed generalist is incapable of judging depth, only breadth. So when hiring, they will prefer to hire grifters over specialists every time.
As a bonus, the specialists often disagree with them, while the grifters never do, and execs love collecting yes-men like Pokémon.
The existence of the toxic generalist is a bane. Besides the lack of merit, they've conditioned an entire generation of execs to expect the archetype of the "genius autodidact". To succeed in many companies today you have to pretend to be such a person to even be get in the room.