Agreed.
I have a JW15A backpacker (the short barrel one). Out of my pile of .22 rifles, it's the one that my 9 year old daughter absolutely gravitates to. It's not just about the length of pull. The short barrel means it has a balance point further to the rear, which makes it far easier to hold and manage.
The bolt is easy enough for her to work, without being pointlessly overly "safe" like most of the "youth" rifles that make you have to #### the thing separately after closing the bolt. I'm deeply opposed to that entire mentality. It's an operation that exists in no other type of firearm, a silly thing to teach a new shooter.
A standard bolt action is plenty safe, and starts them on the right path to building good habits.
Match the 15a with subsonic ammo, and you have a real winner. My middle aged ears barely register standard velocity .22 ammo any more, but to a youngun' who's ears are sharp and undamaged, the crack of a standard .22 is a bit nasty, even with earpro. The subsonics really reduce the crack, and yes, for someone young, even wearing ear-pro, the difference in sound between the two types of ammo is very noticeable.