Just on this, do you factor in that maybe they don't practice the piano because they aren't interested in it, and that's fine because it has no practical utilit

Just on this, do you factor in that maybe they don't practice the piano because they aren't interested in it, and that's fine because it has no practical utility? I.e. in contrast with things like spelling, which do. Also in your opinion at what age should pushing start, and how much pushing per age group?