It's got nothing to do with anyone being fanboys, more a reaction to a ridiculous statement. The below holds true for any manufacturer:
You may well prefer noise to loss of detail, but the fact remains that noise degrades detail. Improved high ISO performance isn't just about noise reduction but more the resolving of fine detail. Producing less noise is the first step, but the larger pixels are able to suck in more light helping to resolve more detail.
It's all very well talking about resolution, but unless you know why you need it more what's the point in having it? The reason I asked how large you print to and what distance your prints are viewed from is because unless you have a an unusual requirement to print very large images which need to be viewed from far closer that normal (some sort of technical evaluation purpose say) the basic premise that the larger you print the further away you have to be from it to view it properly means that any perceived extra detail in higher resolution images would hardly be noticeable from those distances. Once you get to a threshold, and 12MP is certainly well above that for A3 prints if not larger, any increase in resolution offers increasingly diminishing returns and the only people who will notice the difference are pixel peepers.
You've every right in the world to say that you think the D700 doesn't have enough resolution for you, and that you think that Nikkors are 'disappointing' with a 'poor range of primes' and 'shocking IQ', that's your opinion after all. Just don't expect anyone to take your opinion seriously when thousands of artists and highly respected professional photographers, better than you or I could ever hope to be, use them day in, day out, out of choice, because they produce and delivery the quality they need.
When you get to pro-level gear, the quality of kit isn't the limiting factor in anyone's photography here, it's the photographer, but I guess it takes a photographer to realise that.