Darien, New Canaan, Shelton, Ansonia, Southington. What do they all have in common. History of championship football at the high school level. I can't speak for the others, but let me tell you about Southington. The Blue Knights football team is a source of civic pride. Football culture is ingrained in this town & has been for generations. There are two youth leagues to serve as feeder programs. As a former coach in one of them, & parent of two sons who played the sport from age 5 through high school, I can tell you with certainty that protocols are in place to teach safety first in concussion prevention & treatment.
That said, once insurance companies price high school sports coverage too high for town budgets, you may be right about dissolving football at the high school level. However, it may be the less affluent towns that drop the sport first.