This is not to say that sexism or racism isn’t or hasn’t been a large problem, but the correction pendulum has really swung way too far for some people and that is actually not at all helpful since it only builds up resentment among people who actually are supporters of the cause of equality.
A lot of people might not just be that good at what they do but manage to advance by way of their gender/race and scare away any negative feedback. Thus, given that their skills themselves won't save them, leveraging mob justice to do so is a viable strategy for them.