It's a bit interesting that people see this as something that needs "fixing". Is it because it's a psychological disorder? Is it because the parents don't want the financial burden? The pandemic has certainly recently shown me the upsides of withdrawing totally from society. It's not for me (I'm antisocial, not asocial) but I can see why some would prefer it.
You might be antisocial, but at least one of the guys in TFA talks of overwhelming shame. It's arguably (perceived or not) external reasons for this self-solitude, possibly a matter of heteronomy rather than autonomy.
Of course it's a societal issue.
Getting these individuals help might just be treating the symptoms, however, if the cause turns out to be a cultural phenomenon. It might require targeted political effort to properly frame and address the real problems.