Absolutely true, but feeling good for a higher proportion of your years is much more likely if you act like you want a longer life. Most longevity stuff is geared more towards "healthspan" than lifespan.
Having said that - moderation is what I practice. I don't overeat or drink too much but do not eat a tightly controlled diet either, eat healthy food mostly but not exclusively. Work out but not excessively.
Where is my check?