The author is planning on adding a "hardcore mode" where the frame carriages would require power.
He has also designed them to be more fun rather than just super difficult to be able to make anything with them, which is why they are pretty cheap to make. (Although it could be a bit annoying to get all that wood when playing with just that mod, which is something which a lot of mods forget, that some people actually might only want to play with just one mod.)
