Gaon
Each case is differnet, I was just trying to give an example where the choices are to Mechalal Shabbos no matter what, but in one scenerio at least the kid is being Mechalel shabbos where you can watch them and know they are safe vs where they are mechalel shabbos and you worry about their physical safety
One can always do tshuva from watching Netflix on Shabbos, you cannot do real tshuva if you go out hanging out with your friends drinking beers and then drive drunk and hurt someone innocent