I do believe that any training requirements are an infringement and should be done away with ala Constitutional carry. It is the responsibility of the individual to seek higher level training as NO CCW course that I am aware of adequately prepares people for a FoF scenario. There simply isnt enough time. If anything, I would argue that they are a false sense of security.
However, if licensed instructors are charging for their service, they do have a responsibility to carry out their services in a safe and responsible manner. Your state likely has some type of board that licenses instructors that you could complain to.