I hold it against him because I personally think that despite how normalized it is, its one of the worst and most irresponsible things a person can do in their day to day life. That said I am in the minority on this point and I suspect most Americans, especially the part of the base Walz is trying to pick up, won't care.
Apparently the last few presidents have all been teetotalers and Kamala would be the first to not be one in a while. I prefer a teetotaler POTUS but again I suspect I am in the minority on that.