I've learned a lot about lucid dreaming from Giz Edwards' videos on YouTube (he's got a great channel, you should check him out if you want some of the most legitimate information about lucid dreaming)
op, you and that website are incorrect about sleep paralysis. it's not a "condition" or a "disorder," it's a natural process that happens every night before anyone goes to sleep. its purpose is to keep the body from acting out the dreams going on in your mind, and is done by your body checking with your brain to see if you're asleep by sending you signals, such as an itch or an urge to roll over. anyway, you're not supposed to be aware while your body goes through sleep paralysis and the WILD technique requires it.
so yeah