Celebrim
Legend
I don't think anyone has suggested anyone is "totally in the wrong". And I see it's OK for you to use "many" or even "many, many" as a descriptor. I'd also say there is a difference between "the journey is the most imortant thing", "the journey is an important aspect" or even "the journey is also significant" versus "the journey should just be skipped" or even "there can't possibly be anything relevant in the journey".
I'd also suggest "setting is not important" cuts both ways. If the setting is unimportant, how is it that whether the scene is set in (or just outside) the city, or in the heart of the desert, is determinative of its relevance or interest?
This. Just as tactics is the intersection of weapons with terrain, so plot is the intersection of character and setting.
Even in a play, the first act normally involves 'setting the stage', where the setting is described to the audience to provide a framework for the character development and conflict that is going to make up the remainder of the acts. So, in the first act we might learn that in the city of Verona there are two rival famlies, whose youths are in violent conflict with each other in the streets. Or we might learn that in Denmark, the king is dead and his brother has usurped his crown and queen. The setting is critical because it drives the decisions and emotions of the characters.
...right down to "indoors with more than one room = Dungeon"
I'd go with that, except I'd remove the 'indoors' qualifier. Any two rooms with a corridor between = Dungeon. And here we can have very loose definitions of "rooms" and "corridors". You can actually develop a wilderness area as a dungeon by having a 'room' stand in for each hex and a corridor stand in for each adjacency between hexes. In fact, this is very much the classic old school cRPG way of building a 'wilderness'. If you look at a map of something like King's Quest, or of a MUD, it's all dungeon. So, a desert island with a series of connected locations where resources can be found or hazards faced = dungeon.