I'd even go further and say that training wheels optimizing for utility instead of mastery teaches the secondary skill first, so the child can pedal and add power without needing to learn to balance the bike. So, when the training wheels come off, they've got effectively nothing.
And this certainly applies to every other sort of teaching, where learning the mastery-related skills can seem so irrelevant at first.
I'd even go further and say that training wheels optimizing for utility instead of mastery teaches the secondary skill first, so the child can pedal and add power without needing to learn to balance the bike. So, when the training wheels come off, they've got effectively nothing.
And this certainly applies to every other sort of teaching, where learning the mastery-related skills can seem so irrelevant at first.