Wait, how can that be true? I worked in Gothenburg for several months a few years back, and there is a strong drinking culture. My poor language skills and memory may have me wrong, but all pubs advertise 'stor stark' happy hour, which means the beers are big and strong. If drunk walking can get your license revoked, how are there so many cars on the road?

You aren't going to get your license revoked because you are drunk, even very drunk.

But if you are the kind of person the police takes care of on a bench multiple times then it's within their (or rather the relevant authority, not the police) power to consider a person "unfit" for having a drivers license. Won't happen to "normal" people, even if on a bike.