C´mon man get real. He was Arnold´s bitch and Haney? ... lol man he was no where near his full package development. Did he not win the Masters Olympia? the one Joe gave him 
Are you paying attention? What does Arnold have to do with anything? He was retired after beating Lou was only 23 years old in 1975. And I specifically stated that it wouldn't be such a sure thing when Haney came on the scene. And when Lou came back it was a whole different era.
After 1975 he would only have had to contend with Franco, Zane, Dickerson, and Bannout. Easy pickings assuming he continued to improve.
I don't count the Arnold 1980 Olympia. I doubt Arnold would have returned if Lou was still active and if he did he would have lost or should have lost given the shape he was in. Lou would have dwarfed him.