Alcoholism would be the sin of Gluttony (“Gula” in Latin), which is basically overindulgence and overconsumption.
The definition of this sin became rather expansive over the centuries, so it would also cover those who engage in obsessive anticipation of the things they consume, who spend too much on them, etc. One reason for this was that the gorging of the prosperous may leave the needy hungry.
So from that point of view, it seems to me that the sin of Gluttony is still routinely condemned by people of a Christian culture, even if they are not aware of this ancient framework.
Regarding your specific question, I would say that overeating to the point of causing hunger to others is still criticised. At the same time, assuming that there is enough food to go around, eating too much of it doesn’t cause the same negative externalities to others as drinking too much alcohol.
The definition of this sin became rather expansive over the centuries, so it would also cover those who engage in obsessive anticipation of the things they consume, who spend too much on them, etc. One reason for this was that the gorging of the prosperous may leave the needy hungry.
So from that point of view, it seems to me that the sin of Gluttony is still routinely condemned by people of a Christian culture, even if they are not aware of this ancient framework.
Regarding your specific question, I would say that overeating to the point of causing hunger to others is still criticised. At the same time, assuming that there is enough food to go around, eating too much of it doesn’t cause the same negative externalities to others as drinking too much alcohol.