This is very much a Luddite attitude and has no place in an ever evolving sport.
Would it be evolution or just taking the sport out of the sport ?
I suggest propose it to your rep and live with the answer until you get to ask it again.
If Simon has adapted his sling to operate within the rules ,then its possible to do.
It wont be long before we are attaching a tow bar to our FT rifles to drag a Ifor Williams round.