> "Abilities" is the operative word there, as in women, on average, aren't as able
Except that quote doesn't imply that women are less able. You could read it that way if you wanted to be uncharitable of course, but strictly speaking, that sentence simply says that women have different abilities, not lesser abilities. One way that sexism presents itself is an underappreciation of valuable skills, where traits that are typical of the dominant group are recognized as valuable and marked for advancement instead.
This is a standard feminist claim about work place sexism, and so a charitable reading of your quote is basically agreement with the prevailing wisdom.
> Pointing that averages don't imply individual ability doesn't make it better.
Sure it does. If you've made it, then you clearly have the skills required to be where you are.
"6 foot tall basketball players are at a serious disadvantage in the NBA". This is a clear fact. However, height doesn't determine individual ability. This too is a clear fact. Therefore, 6 foot tall players that make it into the NBA should feel reassured that they earned their place.
> he was fired because he made women felt excluded and othered
There was nothing exclusionary about the memo, and "othered" is a meaningless term. He was fired because his memo caused a PR nightmare, and through no fault of his own.
> See also Sundar's quote: "to suggest a group of our colleagues have traits that make them less biologically suited to that work is offensive and not OK
Also not something that Damore claimed. This whole debacle has been a grand exercise in strawmanning.