I know of almost zero kids that enjoy practicing their instrument as a kid yet I believe the majority of adults are happy for the experience. (I have no data tho). I certainly just wanted to do other things (play with friends) so I showed no or not enough interest for my parents to push/encourge learning an instrument.
Assuming I'm correct following the advice of "see what they're interested in" would seem to lead to worse outcomes at some level.
of course I'm not suggesting shoving things down their throats so to speak rather it seems like there's room for some balance between only encourage their interest and require them to do x?
I suspect this is mostly forgetting how miserable the experience of learning was. If learning a musical instrument was net-positive overall, adults would choose to do it. Everyone wants to have learnt an instrument, but no-one wants to put the work in.