The probability of encountering a “non-extremist” right-winger is exactly the same as of encountering a “non-extremist” left-winger and is quite small. The vast majority of people are moderates, either left or right leaning.
Also, from the European perspective, the American left aka Democrats are quite right leaning :)
Oh look, a person that cannot distinguish center from right. I wonder how you drive if you can’t into directions.