Given the system we have, the way to move soccer toward football's status in high school would (IMHO) be to encourage a training season in the fall like football has in the spring. My understanding is there a rule about school coaches and players on club teams as well as out of season practice.
I wonder how these rules compare to spring/summer training rules for football?
Do they not have a spring football Jamboree in many areas? How about fall soccer Jamboree?

Also here in the upstate they have both 7th and 8th grade football teams, while most schools have no soccer in middle school! Looks like Rock Hill schools will be moving to combined 7/8th grade team next year, but still no soccer. I think over the next few years the schools that have had middle school soccer will start to show some program improvements, going on third year for Clover and Fort Mill school Dist's. They even get to play some smaller school JV teams.
While I know the gods of HS football want no competition for facilities I would think there could be a way to find time and place for increased playing/practice for HS soccer teams.
As a final thought, I have always been told HS football is a money maker for schools. Just imagine what the profit margin for the lower overhead sport of soccer would be if they could grow the popularity of the HS game. Not to mention that the fields would be generating revenue in spring and fall!