> Generally people giving advice publicly are in the advice business, not the business on which they are advising

Twitter has lots of tech advice, and most of these authors don’t give advice for a living. People like John Carmack regularly share how they achieved things.

Authoring a book or hosting a podcast is btw often not a great deal from an ROI perspective. It could help you get hired, but it’d be way easier to just study leetcode instead.

I think you could cut people and their intentions a bit more slack.