Pretty sure the nutritionist/guru George Farah has made substantial gains on low protein. I believe his reasoning was the loss of a kidney. Bill Pearl and many others (including myself) have made great gains on low protein.
A pregnant woman needs more protein than a bodybuilder... so does someone who is healing a broken bone, or a burn victim.
This 'high-protein' garbage has always been fed by $$$$$ supplement companies, not scientific studies and resultant proof.
All "high protein" does is gives some Pro BB an excuse for why he blew up 40 lbs in a year. If everyone told the truth about supplements and supplementation, there would be no BB magazines to whack off to. (fking homo)