Well, yea, the guy is definitely qualified to have an opinion, and probably the developers should take note. In this case it just set of an unfortunate misogyny finger pointing nightmare that led to the ridiculous firing of two employees.
To your second point, that's another thing I think a lot about. Honesty, in its many forms. I value honesty tremendously, because how can two individuals (or a community) operate in good faith if people are being dishonest with each other? However... we are irrational. When I was a recruiter, going to a company with my candidate's actual rate, and then turning around and giving my candidate the actual offer, would lead to bad tastes on both sides. Instead, I'd lie to the company, tellm my candidate was asking for more, then then around and tell the candidate that the offer was less than what they were looking for. Then I'd let both parties stew for a bit, give the candidate a call back, and lo and behold I got them an extra five bucks an hour like magic (citing the actual offer). Then, both parties would feel they had really gotten the most possible value out of the transaction and be happier for it.
So then what do you do in interpersonal communication? Are you upfront and honest about your feelings regarding your qualifications? Do you state your opinions forthright, while still being polite? Or do you "play the game?"
I guess it boils down to your values. If you want to consistently be liked more, listened to more, and "get your way" more, you heed the wisdom of the ancients and do the Dale Carnegie. Even if it hurts.
In my experience though, it stops hurting very quickly. Turns out a lot of the times I was confidence in how right I was, I was way off base... And I usually end up learning something by seeing things from the opponent's perspective.