My point is that there are some problems that there's no ergonomics, no lifestyle changes, no amounts of exercises or stretches, and so on, that are effective f

My point is that there are some problems that there's no ergonomics, no lifestyle changes, no amounts of exercises or stretches, and so on, that are effective for. I'm not saying these problems are fundamentally impossible to address, but there are currently problems that our present level of understanding is not very good at dealing with. As a side note, I believe that ergonomics is currently a pseudo science that is only effective if you've got a common sort of problem. All the ergonomics advice I've ever been given for my problems has been terrible.