>>283053889
A) magic exists in this world and is the basis of those skills
B) no one knows how to teach channeling because how do you describe the indescribable?
C) dude has gotten a master class in how to channel all sort of ultra high level magic from his mom and dad
(Both are the absolute top tier) and he wouldn’t have figured out how to do this without Reiner.
Basically without the foundation of seeing the highest level stuff up close for your whole life, you’d never be able to make the leap.