[watwut]

Anxiety of any kind makes life less enjoyable then not having it. People with social anxiety needs friends, wants to belong in group and generally have normal social needs - except that they are afraid to do necessary steps for it to happen and end up isolated and unhappy. Social anxiety is not the same thing as being happy at home alone and thus not seeking wild parties, it is feeling uncomfortable in presence of people. Happy loners exist, but they don't have social anxiety.

Not everyone has social anxiety just like not everyone who is a bit sad has depression. Social anxiety makes you perform badly on meetings, when talking with your kids teachers, when talking with colleges and in all kinds of situations where it actually matters.

Not having social anxiety is not the same as not doing silly things while drunk. Plenty of extroverted highly social people don't do cool stupid things while drunk.