I hope they sell so many of these, because the Mac ecosystem is just better for learning about computers then what most young people use daily.
They don't have an open source kernel. You can't recompile the kernel or build your own device drivers. I'm not sure what you mean by "learning about computers", but I personally find being able to peek into the kernel source code to be more educational than anything in the mac ecosystem.
The hardware here is incredible, but it's crippled by not adequately supporting Linux, BSD, or any other properly open source kernel you can compile and install yourself. A good learning environment doesn't put up immovable barriers like "you need a kernel signed by apple", it lets you push away barriers when you're ready, like "Are you sure you want to turn off secureboot, or install your own secureboot keys"
How? I grew up with Windows, learned decent skills on that, probably as much as I would have on a Mac. The current mobile era stuff has put alot or control and grit away, for making things 'more accessible'.