This doesn’t seem like an unusual finding considering how good humans are at tool use in general. Picking up objects and using them as if they were part of our own body is pretty standard for us.
I remember that learning how to drive a car was actually quite difficult, but by now, even rental cars seem like an extension of my body that I can control mostly unconsciously. (Operating vehicles while entirely unconscious: not recommended)
Isn't it also like gaming, especially with a controller? How "good" you are with gaming is at least a function of how well your brain is able to remap desired actions into necessary controller input muscle movements.
I think what this does is blur the line between extra body parts and tools. And maybe it leans more into the fact that our brains treat tools and body parts similarly.
I remember that learning how to drive a car was actually quite difficult, but by now, even rental cars seem like an extension of my body that I can control mostly unconsciously. (Operating vehicles while entirely unconscious: not recommended)