Very true. The Premier League is the most valuable football league in the world and the most lucrative league outside of the American sports. Even the Championship is inside the top 15:
https://en.wikipedia.org/wiki/List_of_professional_sports_leagues_by_revenue
I find it surprising that the Dallas Cowboys remain the most lucrative sports team in the world, despite the fact they haven’t won anything for ages. The list is dominated by NFL teams.
https://en.wikipedia.org/wiki/Forbes_list_of_the_most_valuable_sports_teams