And enough with this “making a bet” bullshit. Founders aren’t betting their own money, and they are getting paid considerable salaries for their work. IOW they aren’t risking anything. Not even opportunity cost.
Getting funding I understand, but the other 2 are so nebulous and/or trivial sounding it's no wonder people sometimes make fun of those roles.
My general recommendation to those who feel they're working too much is to 'demote' themselves to a position of lower responsibility / talent requirements.
The only time you really need to step in is if something goes wrong. Maybe they are working in a wrong direction, maybe here is a conflict or an obstacle, or maybe they over/underperform.
Good managers push work down as a rule, not when they "can no longer cope."
I am a strict 9 a 5 guy. I believe in sustainable projects. Wisely choose your priorities, make progress every day, and your projects will be successful in the near term as well as in the long term.