Aaron did it on hard work and clean living.
Taking liquid speed is hardly clean living.
As for Ruth, he may have eaten nothing but hot dogs and drank beer, but he also only faced white pitchers (I'm sure Satchel Paige would emerge the victor more than Ruth if they had ever faced one another....not to mention other Negro League players), and had smaller parks to play in. He was ahead of his time, for sure, but he had advantages and disadvantages just like Bonds did/does.