Traits are advantageous until they are not. Consider the shift of the US economy from blue collar work toward knowledge work over the last 100 years. Those types of work favor different traits and types of people.

I don’t think that would stop people from foolishly altering their germ line to chase trends. But the reduction of entropy / diversity in the gene pool caused by that would represent an existential threat to humanity.

My guess is that the germ lines of people who tried to outsmart evolution would get weeded out pretty fast.