>> That means not publishing papers, articles or comments to the effect that "women can't do science" or bell curve arguments about some races being less intellectually capable than others. That is also hounding people out of science.

I disagree with this: why is it hounding people out of science?

Let's say I publish a paper that literally says "Gender/race/whatever can't do science" or "Group X has N points lower IQ than group Y at the mean".

Who does that keep out of the field? And how? I think it keeps nobody out of anything.

Unlike the cancel-culture playbook (call their boss, name and shame, call the cops citing emotional violence, etc.) publishing a paper like that has virtually no effect on any members of the group in question.