Indeed, the medical exemption policy does seem to border on legalised doping at times.The irony is that claims against Russia express USADA.
I.e. those who have disgraced themselves with a bunch of doping scandals
and whose athletes come to the Olympics with therapeutic exceptions
allowing them to "legally" take psychotropic drugs.
Take someone like Maria Sharapova in Tennis, in the run up to her ban she won 2 grand slams and made 3 finals, after her return she never finished higher than a single quarter final.