Please do not forget Linhof! A Linhof Master Technika 2000 or 3000 costs around 7k if I remember right. And what else can it do that a much simpler and cheaper view camera won´t do?
The answer is: When collapsed it is much smaller, fits into a small bag, yet can provide an immense degree of movement for a camera like this. Also, the metal housing makes it pretty sturdy.
Most view cameras are either more bulky than a Linhof Technika, and in case they aren´t, they usually do not have that much options for movements. Many are also made from wood and won´t stand that much abuse that a Linhof can take.
Now this is where I come to the Leica question: Leica M was for decades one of the smallest and most discreet 35mm cameras around. Even today they advertise the Leica M as the smallest full frame system camera you can buy. Remember that there was also the Leica R, but it never became an icon like the Leica M, because it was just a normal SLR (and quite bulky in its last incarnations).
Furthermore, Leicas are high precision instruments built to the tightest tolerances. And don´t forget that they are assembled by hand, made in Germany, where wages are high and people have social insurances. This is adding to the price considerably. Regarding the picture quality, I must say that I feel that Leica lenses have some kind of distinguished signature, especially when you look at the out of focus areas. Resolution wise however, one must admit that every decent medium format camera with a standard lens will outcompete it.
But all in all, I think that buying any manual camera is a sensible way to spent your money. When I bought my first new computer in 2003, it did cost around 1k. 5 years later it was practically worthless. The first iPhone did cost 1k in 2007, today nobody will be impressed by it. Buy a brand new car and it will lose 50% of its worth in the first 3 or 4 years of use. But prices of used camera gear have stayed quite stable for the last 7 years...