He wrote the post on 2019-02-16 and didn't put in the edit until 2019-04-26 so the causality probably happened the other way around.
It seemed like this is a career summary from his time at Google Fiber (which was killed by google).
It sucks when your baby gets killed for reasons outside of your control. You want those years of your life to mean something, for the work to live on in some form (hence the "Please, please, steal these ideas").
He probably realized after publishing that the post wasn't enough to give him closure so he started a company to keep working on it instead.
(I don't know why I am psychoanalyzing a random blog. I am probably projecting really hard.)