As a healer, I'm constalty getting maces thrown in my face and I hate it. I have a sword collection, my 12 pound sledgehammer doesn't hang on my wall, but my Frostmorne and Master sword do.
It was nice in wrath to finally get to use a sword after being limited to ONLY a hammer for so long. Having a hammer be better due to it being in our spells, I disagree. A paladin is a holy warrior, and as you say, swords are for warriors and DK's. Why can't the holy warrior use one?
Finally, I must point to the Lich King. Arthas had a hammer, you can see it in the CoT run. When given the chance to get his hands on a freaking sword finally, at the cost of his very mind, he said "Yup, gimme gimme gimme!"