This is a high quality TD game and imo the best by far. So much effort and creativity has gone into it. Little intricate details in every aspect of this game is amazing. I played this game without this guide and i loved it. Exciting moments and edge of your seat stuff. Like when a monster is so close to the orb and you may or may not get it. Reaching high lvl gems by earning them bit by bit with careful planning and some times a gamble here and there.
Using this form of play ruins and degrades the game. My belief is they didn’t remove this style because it likely brought search hits and popularity with players who heard and wanted to try it.
My point is its fine to try this out but if you really want to get the maximum enjoyment out of this game do it the hard way. Earn every step and enjoy every moment and detail. :)