2. The rules in 3rd Edition are just too darn good for some people to resist. And like a fat man blaming the sugary treats for his inability to resist them, some people choose to blame the rules for being there.
Take skills for example. Yes, almost every skill has detailed support explaining how to set very accurate DCs for the skill. That's a great resource that you can tap as a DM. But there's nothing stopping you, when you're just trying to adjudicate quickly, simply setting a DC based on your gut instinct of how difficult a task is... just like you would in any game system.
And then you've got the combat rules for specific situations -- like trying to charge at someone and push them back. Those are great rules to have when the situation comes up. Otherwise, as a DM, you'd be left with your dick flapping in the wind triyng to adjudicate some kind of ad hoc mechanic to figure out whether or not Frank the Fighter can shove his way past the hobgoblin blocking the only door out of the room. (And you'd probably end up with some sort of opposed Strength check provoking an attack of opportunity that looks an awful lot like the system they've codified.) These rules aren't complicated and you don't have to memorize them: You just have to be barely aware of their existence so that, like the detailed guidelines of skill DCs, you can tap them when you need them.
Finally, let me say that there were only three ways to explain people who claim that 1st and 2nd Edition had fewer rules than 3rd Edition:
(1) They are ignorant of the previous editions;
(2) They are filthy liars; or
(3) They, like the rest of us, ignored massive swaths of the rulebooks because they were nonsensical, pointless, and even contradictory. As a result, they've simply forgotten that those rules ever existed.
I sat down with my 1st Edition PHB a couple days ago and found myself simply laughing at the number of completely nutso, oddball, random rules strewn recklessly around the pages.
Justin Alexander Bacon
http://www.thealexandrian.net