this post makes me angry. I just rewatched E209 of ALTA (Bitter Work) where Iroh clearly states
(From Avatarspirit.net transcript)
Iroh: Lightning is a pure expression of firebending, without aggression. It is not fueled by rage or emotion the way other firebending is. Some call lightning the cold-blooded fire. (Iroh takes the tea kettle off the fire and pours it into another pot. He then begins to pour two cups.) It is precise and deadly, like Azula. To perform the technique requires peace of mind.
What has happened that allows =just any firebender to use lightning bending? (large image)
If you want to argue that it's the lack of spirituality in the world due to the advances in technology, than wouldn't this ability be lost, not made more accessible?