Today I watch a video of a guru who was promoting their services.
This person might be really good at selling, but he is definitively not practicing what he preaches.
The question is, would you hire someone cheap, but good at self promotion, or an expert?
It is a time vs money decision.
If you have less money but more time, this could be a solution, as long as you see potential in that person.
Otherwise, in case of self-proclaimed gurus, it is better to pass them by and really focus on your own business activities.