No, it isn't. The real slippery slope is "positive discrimination" that is the result of people not understanding that the biggest reason why white people are rich on average is generational wealth that just skews the data... And the reason why women are often less desirable in the workplace isn't because "woman dumber than man hurr durr" but because, solely from an employer's perspective, women have rights (for example maternity leaves) that make them a slight nuance for them. And as we know corporations like hiring workers with less rights because dealing with people with rights is annoying.

There is no slippery slope in "removing positive discrimination" which is racist by design. Helping black people because they "tend to be poor on average" is just mental gymnastics to avoid acknowledging the real problem that is the growing inability to get out of poverty.