No one is gonna win that argument, let it go fellas.
I drink and smoke and have sex when it pleases me ( one little bonus living in Thailand ), and none of these vices affect my play, they only interrupt it.
In terms of reaction time and reflexes, they are as good as they ever were, but who can say for certain.
My brain is alert and active.
No two people are alike, so what works for one may not work for the other.