I get what you mean, but I don't fully agree with you. There is nothing to stop them if you ignore the fact that a lot of people don't know how to use commandblocks. And yes a lot of puzzles can be made without commandblocks, but they do help in making the puzzles a lot more interesting and professional. But yeah you do have a point, I'm just too damn uncreative xD. Sorry for my bad English by the way :/.
