Re: It may just be confirmation bias on my part, but...
"Maybe the key to a long life is really just enjoying life and indulging yourself a bit?"
Yes exactly this.
There's an old Victorian song about sex that has turned into a saying/proverb that can be applied to anything indulgent:
I always hold in having it if you fancy it
If you fancy it that’s understood
And suppose it makes you fat? I don’t worry over that
‘Cos a little of what you fancy does you good.
Marie Lloyd ~ 1900