Fitness and Finance industry are basically in the same boat IMO. They are both forced to recommend things that are 'ultra safe' to their consumers and therefore won't get full potential. This is why gyms like PTC and muscle pit in WA are in such small minority, ie very small handful of places in each state.
Plus in both industries, these are the methods you're taught at uni / tafe etc. I've a mate in Sports Science degree who was taught how to do and coach a curl but no mention of a squat.
These are the only 2 industries I'm familiar with but I'm betting every industry is in the same boat. Too much insurance fears, uneducated lecturers, bureaucratic red tape that will get worse before it gets better.