You conveniently left out the the "we have many" part of that sentence you quoted. No one is suggesting it's the
entire generation, or that there aren't plenty of 20-somethings who socially very functional.
But there is evidence out there that Gen Z has higher levels of shyness and social anxiety than previous generations. I personally believe overprotectiveness is one causative factor among others, although I'm not sure whether the evidence is there.
