>He also says people with strong accents are bad founders

More accurately, he said that people who fail to improve their accent over time are likely to be bad founders. I don't have a strong belief about this hypothesis one way or another but I see no reason to dismiss it out of hand (expect for signaling).

>we shouldn't allow women to be founders today because they probably haven't been hackers for 10 years

That "we" shouldn't allow women to be founders is not just an uncharitable interpretation of PG's words, it's a downright implausible one.