Such people are real but they aren't "total shut ins", a lot of it has to do with bullying and anxiety and abuse.

That and our hunter gatherer past, many people simply aren't meant to be corporate slaves that most people are.

Industrial captialism where you own nothing and in a state of permanent indebtedness to rich mega corporations and the richest families on the planet. Not exactly a high quality life if you are are at the bottom of the class structure.