- when someone evaluates another person's skill, the person doing the evaluation is completely objective
- highly skilled individuals would enter a monoculture environment of people dissimilar to themselves
- no prejudice exists in software because you haven't personally ever experienced any
- women are uninterested in software engineering because they're biologically wired to dislike computing, rather than because every computing class and workplace is heavily male dominated
Some time ago, major European symphonic orchestras recognized that their hiring process was bugged, and began to hold blind auditions. The hiring rate for women jumped substantially everywhere this was done.
Orchestra musician is a technically and physically demanding job. Your arguments could have been applied there just the same, for the same result as we see in computing today, but they were wrong there. This suggests we ought to do the experiment to find out if something is wrong here, and that's what lever appears to be doing.