At this point, I think a majority of Americans don't actually know how to drive a manual transmission. When I was in high school (rural town), everyone knew how to drive a manual (including semis, tractors, farm equipment, etc.). Here in Los Angeles, only about one in three people I've met can drive a manual transmission. My guess is, parents (or grandparents) purchased an automatic as convenience in the traffic, and as a result, they raised their kids without ever teaching them how to drive a manual.
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