the point of why so many parents load up their kids with extracurricular activities.
Because when my kids are home without any sort of external structure imposed on them, they gravitate almost exclusively to these three things:
(1) being entertained by some sort of electronic device;
(2) picking on each other; and
(3) making messes and destroying things.
Of these, they tend to strongly prefer (1) but if we take that away, they almost immediately turn to (2) and/or (3).