Well it's called preventing something before it becomes a problem. If someone OD's or almost you make them go get help before hey repeat it or get worse. When you do something to extremes (get so drunk that you pass out in the street) then you need to get some help. When people say "oh he just didn't handle it right it's his/her first time" all you're doing is ignoring a potential issues. It's always better to be safe than sorry in these cases before it potentially snowballs into something serious
He passes out once and now he has a "serious problem?" Jump to conclusions much?
The fact that he handled his liquor so poorly indicates he's new to this ****.