Sorry, the data is against your observations. That was a very cursory search confirming my observations. OTR trucking doesn’t keep a person in one side of a state, or in one state. It makes sense that an entire industry got rid of all the obstacles that kept it from growing in the past 60 years.
Meanwhile, MLB rosters are littered with Latin American players that don’t speak English because American kids don’t want to play. Particularly black kids.
The “participation” data is the key. That is money flowing a different direction.
https://firsttouchonline.com/the-growth-of-soccer-in-usa/
https://sfia.org/u-s-soccer-participation-data/
https://www.thepanthernewspaper.org/sports/analysis-soccers-continuing-growth-in-the-us
https://san.com/cc/underdog-no-more-how-soccer-is-surging-in-us-less-than-a-year-from-world-cup/