Rebuttal to your counterpoint: I've lived in the US for 25 years, so I'm not unaware of the "supposed differences".
What were saying is that these "supposed differences" are mostly over inconsequential things, designed to mobilise the masses into 1 camp or another, all while LEAVING THE MAJOR ISSUES untouched.
It doesn't matter if team red or team blue is in charge, immigrants get scapegoated and caged (happened under Obama & Biden).Just that team red takes greater visceral delight.
It doesn't matter if team red/blue is in power, the HOLOCAUST is armed, funded & covered for.
It doesn't matter if it's team red or blue, the military budget keeps going up, and the almost pyschopathic need to keep dumping military bases into other peoples backyards, the need to freeze conflicts into eternal points of instability (to then be exploited in the future), the need to keep poking at other people's pressure points to instigate war, the need to continuously "regime change" any sovereign country you like (all the while bemoaning "foreign interference" in your own elections... irony wants its ball back)
And failing all of that, the need to create/arm/fund terrorist groups of any stripe or persuasion to get what you want done. Be they right-wing death squads in Central America, to neo Nazis in Europe, to Daeesh in Syria/Iraq (and we can all drop the pretence now that CNN & the state dept all rushed in to validate the Daesh head honcho in Syria)
Etc, etc, boringly etc.
All of these things did happen, are happening, and will continue to happen - irrespective of team red or blue.
And irrespective of whether the bulk of the American population actually wants these things or not.
But yes, I'll grant you, voting team red or blue will impact the eternal question of who gets to urinate in which public bathroom.
Yay democracy