Even the Peloran Treatments don’t guarantee good health, don’t make us immune to abuse.  Not exercising, or eating poisonous junk will still mess you up.  The treatments simply give us a leg up on anyone who doesn’t take them.  The Chinese and the Russians outlawed the “dangerous alien treatments” for instance.  Of course they developed their own versions of the treatments.  Not as effective, but a quantum leap compared to “natural” humans.