Outdated? Jiraya explains how genjutsu works, you create the illusions by manipulating the chakra in their brain to attack the 5 senses. It's something that's a biological thing in the Narutoverse. That's why he told naruto to try and stop his chakra flow.
Also we know every living thing in the Narutoverse has chakra going off Boruto and how the if the chakra tree absorbed all the chakra then everyone would die.
Sorry, but it is what it is
Unless you wanna equalize chakra = reiatsu, then it doesn't work.