Yes, exactly like one of those old copper POTS party lines - remember how providers could easily supply a reliable symmetrical multi-gigabit service over those

Yes, exactly like one of those old copper POTS party lines - remember how providers could easily supply a reliable symmetrical multi-gigabit service over those (like we can with XGS-PON) and how they theoretically could use DWDM to move hundreds of gigabits over them? No??