> Have you considered that perhaps your personal perspective is not exactly representative of large swathes of the industry
Yes. HN is place for ALL kinds of people, sometimes they are not even programmers. Many tips are not applicable to everyone here.
In that case, I would heavily disagree with your suggestion. Your "chill" PM is likely actively running interference on your behalf in order to allow you to spend time on such endeavors. It's a great thing when you can have such a partner, but most PMs (in my experience) are not willing to put themselves on the line like that.