You’re saying that in the long run Amazon will adjust to the “market signals”. But as that Briton once said, in the long run we’re also all dead.
Just as in Keyens criticism to laissez faire, eventually Amazon might accomodate, but the lives and careers of several individuals will be crushed in the meantime.
It also depends on how much pressure will non-unionized workers manage to exercise. And what about the other women with less premium jobs?