I think there are legit coaches who have acheived success in whatever field and then realise they are better skilled at the teaching aspect AND (and this is the big one) can make more money coaching the 100s / 1000s / millions / whatever of people out there who want to learn the skill than they can by just doing the skill / business themselves.

Think about it, if you do the skill / business / whatever yourself you’re limited to your own resources, time, money, team etc but if you then document your knowledge and skills into a course or membership etc you just have to create that once then can sell it infinitely without having to constantly put all the work back into it, so it does kinda make sense in some instances.