Moving the goalposts so soon?
You said it wasnt sin. Back it up or move on. I gave an example from scripture (and there are innumerable others), but please, lets hear some secular logic spin....
You dont get to define sin, whether you agree with the Biblical definitions or not. So, are you wanting to have an honest debate or play Kant and Schopenhauer?
First, you implied that the Catholics who drink see their drinking and their drunkenness as a sin, thus your statement that they have enough booze to kill a mule and then they go ask for forgiveness. Most Catholics I know don't view it this way.
You then said that they are polluting their body and their temple. I responded by saying that it's idiotic to think that's the case.
You then edited your post to reference a letter from Saul of Tarsus to a specific community that was dealing with specific problems in that community. The Galatians community did these things in worshiping Bacchus. That is, they were idol worshipers, according to Saul. As such, there exist exegetical questions about how to universalize Saul's epistles.
The toughest challenge comes in the form of Jesus's first miracle, that of turning water into wine. Recall, that the wine had run out. That is, the guests had drunk more wine than the hosts had planned for. That's probably quite a bit of wine. So Jesus makes quite a bit more. It seems like they are drunk and Jesus is condoning this and acting to get them more drunk.
Further, after making the wine, the waiter tells Jesus the wine is good, but it's a shame that it wasn't served first because it won't be fully appreciated for how good it is since most of the drinkers, by this time, won't be able to tell much of a difference.
Hmm... Why won't they be able to tell the difference? Oh, because fine discrepancy of taste is one of the first things to go when one is inebriated.
So, Jesus performs a miracle to get already inebriated guests more inebriated. Saul tells a certain community that they should not fall into drunkenness and debauchery. Saul's specific admonition cannot be universalized.
The Catholic Church views some drunkenness as sin, but it's not the level of drunkenness that is reached by most drinkers that get drunk. Moreover, if merely getting drunk is polluting your body, then merely eating McDonald's is also polluting your body (in fact, I think that even some getting drunk isn't polluting the body, eating McDonald's and drinking soda pop probably is). If the root of the sin is the body pollution, then it's likely that eating McDonald's and drinking soda pop are sins. And, well, that's absurd.
Maybe it's polluting the mind, then? I don't know that a reduction in inhibitions is a pollution of the mind. Further, if, according to Jesus, the sin of adultery is committed in wanting to sleep with your neighbor's wife, then the inhibition reduction simply allows that thought and desire to be made manifest. But, the sin is already there and committed.
It's either that or, even when sober the whole time, you commit adultery twice every time you actually have sex with your neighbor's wife: once when you want to; again when you actually do.
But, let's return to Saul, since you are relying so firmly on the surface level literalism of his epistles. Saul says that things that keep you away from devoting your life to God are sins. He then says that being married keeps you from devoting your life to God. He then says that you ought not get married. But, since you are weak, getting married is the lesser of two evils.
I doubt you think getting married is a sin or an evil. And, I imagine you have read this and talked about it, and have reasons ready to show why we cannot and should not take these words, about marriage, in a literal fashion such that we should view marriage as a sin. But, you like marriage, so you do the work and accept the interpretation that allows you to keep on liking marriage.
Inebriation, though? Nope, Saul is to be taken quite literally there and his word there is universalizable.