Your insistence that people are unable to point a light meter at a scene and determine a proper exposure is absurd in the extreme in light of years and years of empirical evidence to the contrary.
If you are speaking of YOUR inability to use a light meter, then OK, I accept that willingly.
To simply dismiss it out of hand, and in light of all the overbearing evidence of hundreds of photographic publications that teach these techniques, is irrational.
I won't debate you on this anymore; the facts speak for themselves.