I think it may be potentially very good if scarpet could do such things as make a player walk, or jump or place a block.
This wouldn't be too hard to pull off, especially if added to the modify() function.

On the other hand this could be very buggy on the client and not be worth it, and perhaps be out of the scope of a scripting language?

well you can test how it works right now using player commands and try them on yourself. In most cases it just doesn't look good, but works. Adding just a portion of controls would honestly look weird / unfinished, but you can always run('player .. '), right?

ye, I thought as much. Ill see if it's worth it and then update

nah it aint