Why go to gurus to listen to ideas or ideology, that you can read in books and practice at your home?
Why go to college when you can learn anything from books or by working on it (as profession or hobby)?
Why go to tax planner when you can file taxes on your own?
In World, where information is asymmetric, (and we lack time to acquire information or expertise) we need help. They are our references/guides, with assumption and hope of good faith (No fiduciary agreement)
This is classic Principal Agent Problem.
Does Principal has flaws? Yes. Do they always work in good faith? No.
Simply put, What to do with information/guidance one receive is their prerogative and life/lifestyle of these people is theirs.
Should we appreciate ideas more than the people behind it? Yes. Will we ever do it? No.