There are other strong T&F programs, of course, but nowhere else in the continent is there such a public eye on the program as there is at Oregon. A&M, Texas, USC, Florida, et al are top programs but football is king in those places and most everywhere else. Even in Eugene, since the football team got very good (for awhile), the T&F program is still a big deal and in what's left of the newspaper all the dang time.
Certainly, there must be coaches who don't want to be in this pressure cooker. Most places, a head coach could suck and still be in the job a long time. Assistants who aren't the best can last a lot longer when they're not in the eye of the public.
Not to say that being in a place where fans actually come to the meets is bad; it's just not for everyone.