Youth lacrosse is the fastest growing sport in the US, but that is because soccer had its growth many years ago and therefore the soccer programs are well established and numerous. Lax is moving west at a fast rate, but it is is huge in the NE and Atlantic states, and has been for many years. The #1 woman player in college this year is from Texas, and that’s very rare (plays at BC though, not at a Texas school). If you look at any college roster, most of the players will be from the east coast because that’s where the best coaching is found. Even at schools in California, most of the players will be from the east.
There are a lot of foreign soccer players on college teams, but not so many lax players (mostly Canadians), so when competing for a spot in college, soccer players are completing with the world while the lax players are mostly competing with US kids. At my daughter’s college, with soccer and lax teams of equal size, the lax teams were all US students and the soccer teams were about 1/3 foreign students.
In lax, you get to hit people with sticks. Some think that’s pretty fun. Maybe you should ask your relative if your son can practice hitting him to see if son likes lax?