[skullgrid]

I have a pretty good relationship with my boss (not a CTO, but a member of the executive leadership at my company). I definitely do consider her a mentor to me, and I am certain that she considers me a mentee. Over the last few years she has explicitly gone out of her way to help me improve my leadership skills. Not saying that this is kind of relationship is common or not, but it does exist.

I do agree with the overall content of your post, though.