I suspect this comes down mostly to the popularity of the game. When soccer is the overwhelmingly dominant sport, even the third or fourth tier is likely to get more media attention than the top league for any other sport. As far as I can tell, League Two gets more attention in England than all of rugby or all of cricket. On the other hand, in the US, we have four (arguably five with soccer) major sports fighting for attention. By the time you've covered the top leagues in all the major sports, there isn't much airtime for anything else. You see the same tendency of a single sport to dominate media coverage in some parts of the US. When I was in high school in Houston in the late 90s, high school football got more coverage in the Houston Chronicle than even MLB or the NHL.