How did CEO become "project manager"?

And do you have any idea how complicated being a product manager is? You have to deeply understand your entire team's footprint, blockers, other teams, industry trends.. It's hard work. Plus you manage timelines and have to de-risk every single day.

I don't think you know what you're talking about.

A factory worker takes a day or week to train.

A product manager takes years to change.

A CEO is learning every single day, doing the PM job for the company + hiring + managing relationships + so much more. If they don't, their company is dead. They're steering a giant ship by wire.