>> When exactly did he say "women
>> should not run a startup."?
At the end of his message he writes: "For the case of a female entrepreneur I'd say no, you probably shouldn't have a baby and a startup at the same time.)"
>> Women founders are an edge case.
While it might be true that female founders are a small percentage, that doesn't mean they don't deserve the respect of being included in the discussion on equal footing.
They are equally capable of being founders, as such it's best to use gender-neutral language out of respect.
Another way to think of this, is that women wanting to vote was an edge case.
Another way to think of this is that black founders are an "edge case" according to your description. That doesn't mean you should exclude them from the discussion.
The words we choose are very important, and being inclusive costs you nothing but a little bit of empathy and diligence when thinking about the "edge cases."
And yes, his point about having a supportive spouse making it easier is correct. However, in many cases that spouse needs to make money to support the startup spouse--which precludes them being the primary caregiver. Which goes to my point of "start in your 20s, family in your 30s" advice.