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Eugine_Nier comments on The noncentral fallacy - the worst argument in the world? - Less Wrong
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The sexism associated with evolutionary biology is typically the result of the perceived (or actual) claim that because sexual differentiation has a historical and evolutionary basis, it is morally correct to reinforce those differences today.
You can point out that that type of claim is not commonly made my evolutionary psychologists, but when lay people perceive that that claim is true and use it to justify sexist actions that they would not have taken in the absence of their perception of such a claim, then it is the case that evolutionary psychology contributes to behavior which unfairly discriminates on the basis of sex.
One of the key points is that "Evolutionary psychology is sexist" and "evolutionary psychology contributes to behavior which unfairly discriminates on the basis of sex" are very nearly the same statement, while "Evolutionary psychology is riddled with false claims produced by sexist male scientists" is a radically different statement.
I'm not sure what you mean by "reinforce", but it seems reasonable to take these differences into account when making decisions.
For example, suppose that evolutionary science has determined that is was pro-survival in the past for females to refrain from occupations which had high fatality rates.
Reinforcing that would be claiming that females should refrain from or be prohibited/discouraged from those occupations in the present and near future.
Also sexist is the line of thought "Females are statistically more/less likely to be X, therefore I require that it be a male/female who performs task Y.", when variation within each sex is great enough that there are a very large number of one sex who outperform a typical member of the other; a specific example would be "Females are less likely than males to complete a degree in mathematics; therefore it makes sense to award this scholarship to the equally qualified male instead of the female".
That's not the relevant comparison. In practice the comparison is between an above average members of each sex.
In your example, than depends on whether the first clause is still true after controlling for whatever qualifications are used in the second.
You don't always have the luxury of choosing from among a sample that includes above-median performers.
The second case is a textbook example of sexist thought; I thought it was clear that the first clause was not controlling for anything, while the second was making a specific measurement of expected performance.
In that case comparing average members of one sex with the above average members of the other is still not the right comparison to make.
Even this statement is ambiguous. Does the specific measure of expected performance actually screen of gender?
You never need to compare the average, because you only ever need to compare a small number of individuals.
Performance in the production environment correlates with the measured expectation equally well for males and females.