I agree with you.
Left and right are mindsets - not political movements. Politicians have figured out how to harness the left and right mindsets to keep us arguing about time-wasting argument fodder to keep us from paying attention to the real problems.
I've given it a lot of thought.
Left wing mindset people drive progress, creativity, and our culture keeping us moving forward preventing cultural and stagnation.
Right wing mindset people harness the ideas often created by the left, make them work smoothly, effectively and keep the lefties from moving us forward over a cliff.
You need both left and right wing people to make the world work properly - as well as a few of us rare "mid minded" people that qualify as both and neither at the same time to patch together the differences.
Politicians have turned it into a cultural war where "both sides" are the same and "either" side winning gets us about the same results, and by keeping the war going and amplifying the differences between the "two sides" they keep those who are fighting from seeing there's really more than two ways to look at it and the very act of fighting this war ensures the wrong side wins.