Because, alas, it's not that simple.Ladies, Ladies, Ladies...I think we need to cold chill for a moment. Why can't we just accept that both Canon and Nikon make superb camera bodies and lenses and leave it at that?
Although neither is it a case of one being far superior to the other. Better suited to a specific task, perhaps, but not superior.
Both offer something that the other does not and both have gaps in their range where they ought not to. If it were just a case of whether you preferred Nikon's approach to Canon's, life, and this thread, would have been much easier going thus far.They are so good in fact, with such little difference between them that it really is just a matter of which system you prefer.
It's not pointless to discuss which is more suitable for a specific photographer or type of photography, but it is pointless to argue about it.I can't help but think that the argument is absolutely pointless.
For example, I dislike Nikon's approach to their DSLR cameras apart from the D3 and D700. It annoys me that there are still lenses out there without AF motors built into them. I despair that with certain lenses you've got to get your slide-rule out and run through a set of charts to figure out if the lens will even fit your camera, let alone work properly.
I also hate the fact that Nikon still plod along with their 80-400mm when Canon have the far superior 100-400m, find it incredible that Nikon don't offer the same quality of prime lenses under 200mm that Canon do and really find it hard to understand why Nikon lenses have so any bits on the lens mount that can get bent/broken/damaged/dirty so easily, where Canon's EF mount system is so neat and tidy.
But then again I hate the fact that I've got to buy a 1Ds MkIII to get the AF system and sensor I want in a Canon camera.
Swings and roundabouts, eh?