This is true on some level, and what you describe has been called type 2 fun. But for plenty of people, partying and socializing is really type 1 fun, they find it enjoyable the way some of us find working on programming or other nerd things intrinsically rewarding in the moment, which they may see as unfun but potentially good for you long term.

My point is, yes, sometimes it's good to just ignore the discomfort and push through, but we should also know that it's not how everyone feels about it. Some people actually willingly go down into a crowded basement club with loud music and not just as some kind of tough challenge to survive and shape your character to have tbuilt tolerance for that harsh environment,but they find it enjoyable, no matter how baffling it seems to the rest of us. I don't know proportions, but these people exist. Of course plenty of people are somewhere in the middle range, where they enjoy some aspects while hating the rest, and the thing they enjoy about loud clubs is likely about prospects getting laid and similar stuff.