Not sure it speaks about differences in kids, in ages, in households, or likely a combination of sorts.
Also, not a judgement on your kids, just a counterpoint about the resources available and how some people will tend to gravitate in different directions.
7 year old daughter is learning to knit and forgot how to "cast on" , so she jumped on YouTube to search a how-to and had one of the methods figured out in 20 minutes.
So, perhaps it does have more to do with the availability of such edutainment since they were very young -- we've been on this path for 5 years or so and it has just become "the norm" if we are to use YouTube as a household.
(I will admit that as Dad, my time on YouTube is split between learning about whatever new hobby has peaked my interest , currently SDR related stuff, and car related material for fun. I've also fallen into the LTT universe, but am aiming to back away because it, in my opinion , is just providing that mindless watching which I aimed to get rid of around 16 years old (ie, decades ago) to better use available free time.
Seems everyone is just different, but the resources are for sure there!