What would you think of this response from a personal trainer?

[Anonymous]

I saw a personal trainer for two years and after about a year plus of seeing him weekly I sprained my ankle one morning when I was supposed to see him in the evening. I called at noon to cancel my regular evening session but I still got charged. Was kind of hoping for a pass since it was an accident and not by choice but I understand the policy. They can't book in another client and they lose the money for that time.