Please explain exactly what it is about causing harm to your organs and increasing the probability of harm to others that makes you trust someone more than someone who does not increase the probability of harm to themselves and others?

People who drink but don't want to get drunk are trying to have their cake and eat it. They have an advantage over other people that is only OK if everyone already trusts everyone else in the group. If you don't want to get drunk for health reasons then leave early because hanging around and not drinking is suspicious.