Oh no. This is not meant as a critisism of these devices. They could indeed also be very nice tools for terapies.
Your friends remark about the violin is spot on anyway. Nothing is a sbad for a beginners spirit as trying out such a complex instrument. it wil then scream out: "You suck at this!"
I was only trying to be a bit philosophical about what makes msuic music and the danger of taking music too seriosuly, especially when there is such a small chance of recognition. In that respect devices like these are indeed much more non-committal. No pretenses. One simply undergoes the experience.
On a less serious note I must however repeat my earlier remark: Sshouldn't the young ladies in your video smile a little bit, if only now and then? In other words. Are they actually only doing this for fun or just to please Daddy? Or is this more a cultural thing? Should well behaved children just not smile on camera where you live?
Only being curious though.