Yeah, notice I said "treated as" rather than "actually is". I don't expect even good polygenic scores as of 2023 to be more than mildly correlated in a scientifically-interesting but practically-useless way.
The problem is everyone is an idiot about this kind of stuff. See the BBC article linked above, where a couple of criminals have been set free on the grounds that they were found to have some genes mildly associated with criminality (!!!???!!!)