Most of the best speedcubers from the late 2000s era when I used to follow the "scene" went on to work in FAANG or mathematics research or quant something similarly difficult and analytical. There's no real future in cubing, I saw it as a way for especially gifted teens to demonstrate to the world how excellent their minds were at computation and pattern recognition. Not dissimilar to track or football or spelling, some young people possess the individual burning flame to want to be the best and personally I love watching them do so.