You are aware that something called "the Fall of Man" happened a few years back, no? Free Will was reputedly involved? It was reported to have had some deleterious effects on God's creation?
I don't believe that there will be drunks in Heaven; but that doesn't mean that there aren't a few otherwise-upstanding Christians out there who struggle with an innate weakness for the Demon Bottle, here and now, in this life. Other folks have other weaknesses.
The question is not whether or not we are each born with temptations towards one (or more) sin or another; I think that's almost a Theological certainty. The question, rather, is whether or not we choose to act on our innate temptations.
We enter the world literally as innocent as babes.
What happens to us, specifically the choices that we make between the womb and the tomb remains a matter of free will.
Your observations on temptations and our personal struggles with them are poignant.
I don’t claim to know all the answers, but I do know what I believe, and all I can do is “each day, try my best, and trust Jesus for the rest.”
Please see my tagline.