Did you even read the article carefully? The 7% figure corresponds to $40MM+ exits for YC. There are a huge, absolutely huge number of YC startups that get acquired for less than that. Many of those are acquihires ($<1MM-5MM) where the founders make probably as much as they would if they had taken a corporate job, except they now have the invaluable experience and credibility of having founded a company; others are small acquisitions where the founders still make a profit ($5MM-40MM).
rdl is suggesting you pick top startups that are post Series B and which already have multi-hundred-million to billion dollar valuations (think: Stripe, Pinterest, Airbnb). He is not suggesting you join a 5 person YC startup that is still trying to get product market fit. Hugely different categories. rdl is essentially suggesting you work for the roughly one YC company out of every batch that becomes a great success - and that you make that leap when the startup had already proved itself.
From reading your other posts it seems like you are willfully misunderstanding his point.
rdl is suggesting you pick top startups that are post Series B and which already have multi-hundred-million to billion dollar valuations (think: Stripe, Pinterest, Airbnb). He is not suggesting you join a 5 person YC startup that is still trying to get product market fit. Hugely different categories. rdl is essentially suggesting you work for the roughly one YC company out of every batch that becomes a great success - and that you make that leap when the startup had already proved itself.
From reading your other posts it seems like you are willfully misunderstanding his point.