Most players cheated. Mays took greenies and Mantle injected hormones. Aaron said he tried amphetamines when they were getting popular but didn't like it. If a player today said they only took something once they'd get killed for it. The older players always get the benefit of the doubt.
Also I don't even consider it cheating since baseball knew what was happening and looked the other way until Canseco exposed everyone. If you're not enforcing the rules you're actually promoting them to break it.
That's a great point!