yeh i agree with you man i laughed when i saw that pic why would you ever cut the leaves like that, just do it from the stem like this guy said
well i wasn't trying to even start explaining it to you newbs but here it goes anyway
the plant does this thing called photosynthesis, now in order to do that it needs to have roots so water and nutrients can travel to the leaves where there is light being sucked in by the chlorophyll, the more leaves, the more photosynthesis takes place. one thing cant operate without another. so it may take others to be compromised.
now to my point when you take a cutting it is gonna have to much foliage and no roots to have all that shit happen. so you cut the leaves shorter
( and no it doesn't hurt it) all it does, is just cut all this activity in half so it can concentrate more on rooting than the above process. after two weeks bright new green foliage grows and the trimmed leaves fall off because the plant will use these nutrients stored in the leaves, it cant use them for photosynthesis but it can use them for their nutrients. like i said before my clones always root in less than two weeks and I've done it a hundred times to know that they don't Hermie in the end.
I'm not telling anybody to use this technique but simply sharing my experience with someone else. and i know for a fact that this doesn't hurt the plant one bit but helps it in my opinion and its just that my opinion from experience.
and besides they are already stressed to hell n back from getting chopped off the side of a plant so i dont see just trimming its leaves is gonna hurt any worse.