Very valid point and would be forced to agree with you. I am a mere hobbyist at best so my photography is a money pit.
It certainly wasn't meant to be a criticism in any way. There's just no way I'd put up with the hassle and cost of switching systems unless I was chasing some money at the end of a tunnel. If you're shooting for fun, how much does Brand X's marginal advantage in tech specs really affect how much you enjoy your shooting experience?
If I do a safari by myself, it costs about £3K for 2 weeks including flights. If I nip across the pond to the States it costs me marginally less, maybe £2.5K. I would say most of the trips I do, perhaps 2 or if I am lucky 3 in a year end up costing me the wrong side of £6K.
For me, photography is a great way to see the world, visit new places, experience different cultures and capture as much as I can on camera. A lot of the places I have seen to date, I doubt I will ever get the chance to go back to. Given the investment it requires to get there, when I visit, I want to capture in the best quality I can. I picked up 2nd hand 1Ds MK III as I was not able to "drive" the 500mm f/4 reliably with either the 40D or 5D (although I know others have/do). I've used a 7D with said lens, but always prefer the 1Ds pictures.
The new D800 and D4 both can do AF at F/8.0. And it's a feature I would not like to lose. There are things that I like about both cameras, but the same is true of Canon. And of course I would be stunned if Canon did not release a camera that could do AF at f/8.
Plus, if I am to look on a 5 year view, many of my lenses may not stand up to the "scrutiny" of higher MP bodies, be that Nikon or Canon. I figure that if I change glass, then I want it to last at least 3 future generations of body. Right now, I am looking at adding the 24-70 and 70-200 f/2.8. But in the <24mm range then Nikon has the best lens by far in the 14-24mm. So if the only lens I don't think I would change right now is the 500mm, does it make sense to stick with Canon - especially if I will replace most of my Canon glass over the next 18 months? Right now, I cannot tell. Nor will I consider changing until the end of this year based on what both have released, and even then it would be a gradual change probably running 2 systems in parallel.
That's less than ideal, but if I believe (and I don't yet) Nikon will be a better solution for me longer term, then I will absolutely swap. You're right, I do not need to make a living from it, but I do want to get the best pictures...
Much to research this year, especially around Nikon glass and how well it compares to Canon, from w/a all the way up to the big primes.