This data allows you to see if children of sales assistants, restaurant workers, janitors, are underrepresented. It allows you to measure social mobility and meritocracy.
But can't the same thing be said about melanin levels? "There is no data suggesting there is a problem" is a door bad actors hide behind all of the time.
That's not actually statistically true, though. Like, the biggest predictor of your life's financial outcome is the postal code you grew up with.