Kamikaze Midget said:
X + Y = 4. X + Y can be almost anything. All the players see is the number 4.
OK...Here's the thing. X and Y
cannot be almost anything. They have to be two things which, together, equal the number 4.
Another way to look at this:
Imagine that you're learning to drive a car.
Your mother tells you to use your right foot for both pedals.
Your father tells you to use your right foot for both pedals.
Your sister tells you to use your right foot for both pedals.
Your brother tells you to use your right foot for both pedals.
Your driving instructor tells you to use your right foot for both pedals.
Some guy you don't actually know tells you to use your right foot the break and your left for the gas.
Who do you listen to?
In 28 years of gaming in two countries and several states (Wisconsin, Indiana, Missouri, California, Lousiana, Virginia) with hundreds of different players, I have seen many, many DMs who made the same claim as you are making. And they believed it, for the most part. And, in each and every case, their actual games fell far short of their claims.
I am not talking about people, like Odhanan, who say that they can devise enough background to be able to wing individual sessions. I know they exist; I can do that myself. I am talking about people who believe that they can forgo prep work and change things on the fly and that no one will notice.
If that animal exists, like sasquatch, it keeps well out of sight.
RC