So I heard a parent relay this great fan theory from their kid.
The reason Luke was hesitant to accept the Lightsaber from Rey is because it’s actually the first step in her Jedi training. “How do you properly give someone a lightsaber? Clearly not with the blade end pointing right at them.”
Can’t be true, Kylo had Jedi training and he didn’t know how to properly hand over a lightsaber, either.