A quick release would work. The answer is mostly tradition. FG riders like to think somehow they put out so much more torque on a FG hub that it would pull a QR hub out of alignment but that's just hooey unless you don't know how to use a skewer properly.

There is a chain tensioning technique that requires you to alternately tighten each side individually that wouldn't work with QRs but there are other ways to do it.