Hard to treat symptoms with immunological conditions. I mean, there are vitamins and supplements, but noone is gonna generally hand out economy-sized bottles of controlled substances for exhaustion, etc.

These sorts of conditions are systemic, and the causes and ways of dealing with the accompanying syndromes are probably always going to be different from individual to individual (well, likely the exact physiological causes anyway).

So far all the trials attempting to do so have failed. Its not that people aren't trying this, it just doesn't work for most of the symptoms.

It's true, this is why there are so many government agencies focused on healthcare. The medical field lacks a healthy profit motive. Healthcare CEOs use their fiduciary responsibilities as an excuse and say they'll get sued if they don't exploit situations.

There was a SARS vaccine as far as back 2016 which could have changed everything but was ignored. Pharmaceutical execs told them they were, "waiting to see if it comes back yearly" first