A couple of questions for people who are strongly opposed to the Quantum Ogre:

First, are you ok with improv GMing?

If so, why do you find it acceptable for a GM to spontaneously invent an encounter in the middle of the game when they feel it is appropriate, but not to spontaneously decide to use a pre-planned encounter in the middle of the game when they feel it is appropriate?

If you do oppose improv GMing, do you insist that all encounter be tied to a specific time as well as a specific place? For example, you hate the idea of an ogre always encountering the party three days after they leave town, but would you be ok with them always encountering an ogre the first time they enter the forest three hexes north of town? If yes, why do you feel an encounter that is locked to a specific space but not a specific time to be more enjoyable and / or realistic than one that is tied to a specific time but not a specific place?

If no, how do you actually ever find adventure? I would imagine a game where encounters must be planned in advance and be locked to both a specific time and place to be incredibly time consuming for the DM, and incredibly boring for the players as I would imagine they spend most of their time just wandering around doing mundane tasks hoping to be in just the right place at just the right time to actually find the encounters.