Discipline is the most-cancelled category of personal service.
The personal-services market — coaching, therapy, training, accountability — runs on a thirty-percent same-week cancellation rate. The cancellations cluster in exactly the demographic that pays the most: senior knowledge workers, founders, executives. They book at the moment they feel they need it. They cancel at the moment they feel they cannot afford to keep the appointment, which is precisely the moment they should not.
The market accepts this. Calendars open and close around it. The cancellation is the product, in practice.