You're still confusing uninformed desire with informed desire. If someone takes a programming course or two, and decides they are not cut out for programming, that's fine. But what's clear is that women are not taking programming courses, so they cannot make an informed decision - it's just assumed that because women don't want to program, women would neither enjoy it nor be good at it, and this is fine.

It's only fine if it's true that women would neither enjoy it nor be good at it.