I was a teenager three decades ago.
1. No one would ever say “get a hobby, nerd” (“get a life...”, OTOH)
2. No one would say that about teens talking about politics, which non-nerd teenagers did commonly. They would say it about talking about computer code, though.
> It is an absolute disgrace how it's become normal
Why?
> Or that mine is an unpopular opinion nowadays.
The continuous political vigilance widely acknowledged to be necessary to prevent liberal democracy from devolving into tyranny is incompatible with the political disengagement you seem to prefer, so I think would be not at all a disgrace if your opinion were unpopular.
Though lamenting political engagement isn't particularly unpopular (but, amusingly enough since it often is overtly tied to complaints about partisanship, seems particularly popular among partisans of the right.)