The only people with levels in my game are adventurers. All others are just regular people with various levels of skills.
About 2% of the population have any class levels.
"You point your finger and determine the range (distance and height) at which the fireball is to burst."
Even harder. Ever try to accurately name an exact distance?
A grid intersection is about the size of a bulls eye on a target... Grab a ball and throw it at a target from 30' or so away. Do you think you will hit it 75% of the time?
It's about as compelling as me making a Fighter with a 10 int and trying to get him to be a magic user type via UMD... :hmm: And then complaining that the rogue is better at it...
What you are overlooking is that the "feat" comes from longer term knowledge. If you are a spell caster and reincarnate, do you lose spell casting knowledge? If not, then you don't lose a known feat.