A scary possibility is that it has to do with how much of the alternative you've experienced in your life, i.e. infinite scroll grabs you less if you've experie

A scary possibility is that it has to do with how much of the alternative you've experienced in your life, i.e. infinite scroll grabs you less if you've experienced the joy of a hobby, a good book, being outside a lot, etc. - things that take more effort but that can give deeper satisfaction. If this is true, then the more damaging it is to encounter infinite scroll at a younger age.