Man, not gonna include any quotes because I agree with too many people here. But I want to say a few things..
The occasion determines zooms or primes. If you're dealing with fast moving subjects vs studio, you maybe want zooms. Oh and I am a strong advocate for primes! I've used my 28mm all day on a shoot before. Usually, because it's later in the day. Also, I feel like the IQ is so much better and sharper. Having the option of wider apertures is a major plus of course. Yes you have to move around for the framing but I don't know, for me that's the fun part. Main issue is not being wide enough. I think that the reason behind sharp primes is that it doesn't zoom and all that glass is focused on one focal length so the IQ is not compromised.
If you have a nice zoom, by all means use it. But I can get some excellent photos with a prime or two. I don't have to change too much either. Again, it's usually not being wide enough. Anyways, I like this topic. Happy shooting!