I think the post could also be interpreted as saying, “when you select for rare levels of super-competence in one trait, you are selecting against competence in most other traits” or at least, “when you select for strong charisma and leadership ability, you are selecting for below average management ability.” It’s a little ambiguous about how far this is likely to generalize or just how strongly specific skills are expected to anti-correlate.
I think the post could also be interpreted as saying, “when you select for rare levels of super-competence in one trait, you are selecting against competence in most other traits” or at least, “when you select for strong charisma and leadership ability, you are selecting for below average management ability.” It’s a little ambiguous about how far this is likely to generalize or just how strongly specific skills are expected to anti-correlate.