From what I've read, I'd much rather live in a world full of Erdőses than a world full of Feynmans, a world full of Paul Grahams, or a world full of Gell-Manns.

I wouldn't describe Erdős's amphetamine use as "hard life". He wasn't taking the pills for euphoria, and his body survived longer than most people's; amphetamines in the doses he was presumably taking don't seem to cause much extra wear and tear on the body.