I'm sorry, what? I'm a man, I made a statement about men which I do not find offensive. You edited it to be offensive to women, and that's supposed to make me feel offense?

No. I'd recommend you also ask a woman for her opinion, though, in case my male-ness has prevented me from seeing the obvious.

For future reference, statements made about privileged groups are not, generally, as offensive as those made about the unprivileged. For example:

My general view: if men are avoiding childcare due to the stereotypes and intolerance as you describe, then good riddance.

His point is that it's offensive to prejudge all men in tech as incapable or unwilling to treat women as equal individuals. This sentiment is rooted in the idea that most men are not sexist, chauvinist, assholes. Those individuals who can't even be bothered to endure the torment of a male teacher lest they be patronized or spoken to with a tone of condescension are probably not well balanced people.

From another perspective, would you think it reasonable for black men to avoid tech because of "a thousand previous encounters with [white]men who were abjectly unable to interact with [black individuals] in a way that left them feeling comfortable"?

Then he and you should take it up with the women who have had these negative experiences, whose prejudice you both are supposing, and not me. Do let me know how that goes.