A lot of medical (and veternary) care is not much better than not doing it.

For example, dogs limping on their back leg that have torn their cranial cruciate ligiment (like the human ACL)... that heals on it's own if you put the dog in a cage for 3 weeks or so. This is now recognized by the industry as "conservative management" but you used to be told that the dog needed surgery. Still they say this only works for small dogs. But this worked for my very large 60kg German shepherd.

Sholder impingement used to get surgery to grind down the acromion to make more space for the tendon. Now they don't do that, they just do physical therapy - just spending a little time hanging from something fixes this (if you have this problem, don't immediately put all your weight into the hang while it is impinged you have to get it to slip through first).

People spend huge sums on surgery or orthotics for plantar fasciitis when $5 athletic tape quickly cures most cases.

There will always be people and subsections of the medical industry dominated by people who are trying to get rich and aren't entirely ethical.

That doesn't mean the entire industry should be discarded, just that you have to do some digging and be choosey.