They don't teach it, because they don't know it. And here is exactly what I've been trying to explain to others (when asked) about why I won't move even though I live in a third-world block of poverty and the location is slumlords galore. I have spent years building up an energy here (without physical signs or symbols) where I have four active gateways and around 20 different routes that expand onto the main Ley Lines. And I've built this with my own energies. They exist in 4D, but sometimes they can be vaguely picked up by military instruments in 3D.