a clipping error wouldn't just be graphical, it would cause your thing to flip or fly across the map for no reason lol
half your time is spent carefully aligning things,
and realigning,
and starting over on that piece,
and retrying that wire,
and retesting that misaligned object,
and retesting that misaligned object,
and making this thing
and trying desperately to make this simple thing symmetrical, so it rolls right.
rebuilding this wheel, because this advanced physics engine thought it should cause the car to do a backflip when you turn left
wasn't so "slap together and finally have fun" like most sandbox games are.