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Your mother bequeathed you with two things:
the brains to figure out that she was wrong and
the backbone to follow your own conscience and path.
Honest question: Was there no father in your life?
Usually dads teach us to deal with adult authority, both male and female. Dads are really indispensable for this task.
Your mother wasn't stupid, she was, my guess is, foolish and arrogant. The "leader" of the seven deadly sins is pride (arrogance).
Oh yeah, he was there too, but he was a deranged liberal too