I did YC also remote, though a bit earlier than the article's author. The part that stood out to me was

> In their picture of the world, you, the founders, should only build a product and talk to customers, everything else is superfluous and waste of time. Hiring is waste of time, paid advertising is waste of time, content is waste of time, talking to investors is waste of time, getting media coverage is waste of time.

I talked to many other founders who also disliked this view (only talk to customers and build), and they all tended to be the worse founders in the batch - a large part of the value add yc provides imo is acting as coach/therapist and pushing back against founder pschology/thinking traps. The view that many things founders want to do early is a waste of time is correct and works, and hearing that can be jarring for many.