Fire Breathing is aspirated fuel through a flame.
Fire eating is, at it's base, a lit torch held in the mouth.
Breathing is more dangerous.
And you don't die from one inhalation on fire eating. That is an extreme fallacy. In fact, there are many fire eating stunts that involve slight inhalations. I've known fire eaters who have been doing it 50+ years. They are missing their teeth and their sense of taste but they are not dead.
The same can not be said for all
Fire Breathers I have known.
One of the major things I learned from them is that just because they are pros for years doesn't mean they have done their research and know all the dangers...especially as information is updated over time.
However, the more you post the more it seems like an ad for your "friend" rather than a serious discussion.