It looks like a sensible change on the face of it - you either understand gears or you don’t.
If you do then once upon a time it may have been necessary to learn how particular gearboxes worked but they don’t really exist anymore.
If you don’t then it may be possible to be taught that understanding and then apply it to different vehicles.
If you can’t be taught that understanding then this change won’t affect you.
My daughter who is a fairly bright girl with a science degree doesn’t “get” gears whether they are on a pushbike, moped or car, she just can’t do it. It’s a practical skill that I and others have tried to teach her and been unable. Giving her a licence to drive a geared LGV won’t change that - she still won’t be able to actually do it. (I do understand that is not what is being proposed - that would be silly).