A good thought – why are we all fighting for the “right“ President – why not one President for one half of the country, and another – for another, and everyone will be happy?
This is not (just) a joke: first, one of the original considerations for US Constitution was to have a 3–person Presidency, representing North, Middle, and South. More seriously, we have a federal system where everyone can live in a state with a preferred governor. On many cultural issues, you have a choice between complaining or moving to a state you like.
Shift towards more grandiose federal power created current situation where we all need to fight for federal offices. A lot of issues that President run on (right to life, arms, economic policies, education, environment, taxes) could be resolved at state level, leading to the Presidential campaign focusing on international affairs.