Are they a coach you would hire if you needed help or backup on that specific field.
The main challenge is that there are no guarantees.
A coaching session coems and goes and there is no guarantee that you will get real value from your investment, in that case $ hundreeds! with almost any coach out there.
In other terms the perceived value for the service if usually not high enough for prospects to hire a coach.
This is why the conversion rate can be low.
If you want to shift that balance, you need to be very specific in what a client will get and what exact difference this will make in their lives.