I feel adding more to the line is overkill and not needed. Don’t need to turn Luke into Basil Exposition after all!
I think the whole Leia sending Ben away to train with Luke was explained enough as is in TFA and TLJ. Leia wasn’t a Jedi, Luke was. Leia sends Ben to get force help from a Jedi.
JEDIT: Plus, it makes Leia look like an even shittier mom knowing the darkness her son is struggling with and pawning him off on someone else.