Would There Ever Be 10,000 People To Watch Climbing Event In U.S.?

The recently concluded bouldering tournament in Melloblocco, Italy had 2,600 contestants and 10,000 spectators. I wonder if that would ever happen in the U.S. I am not saying it’s a “problem” to be solved, just a difference between the interest of bouldering in Europe and the U.S.  (I wouldn’t go to watch a bunch of people I didn’t know, climb. Especially if I knew there’d be thousands of spectators. I think I’d rather go climbing than watch others.)