DFK! said:
D&D has a system for the GM to properly balance encounters...
D&D might not be on its own when it comes to encounter difficulties, but it is certainly in the minority, by a fairly wide margin.
Indeed: the D&D 3e 'balance' system does not even work properly. Dozens of monsters are ill-CR'ed, and there is a massive difference between what an optimised and non-optimised party can do. I'd go as far as saying that the D&D CR system is actually a drawback, because it lulls GMs into a false sense of security. I can think of at least three times I've been in a TPKed party where we were massively and obviously outmatched, and the GM wailed 'but the CR said it would be fine'. No GM can and should ever trust or respect any balance system contained in a game, because they are not situational.
You cannot seriously point to the CR system and say 'Look, a system that balances encounters properly. Something like this SHOULD be in ever game!' because it's like standing next to a Chevrolet Corvair and saying 'This is a great car. All cars should be built this way!'
Disdainful? No: Resigned to reality. There's not much point complaining about what 'should' be in a book that isn't there, especially when that thing is something that needs to be in the GM's head, rather than set down in stone. You just have to muck in and get your hands dirty, and we've tried to offer advice with dealing with that.