Well CFM, for a little science check out the WSC charts that Jerry Garcia just posted. I'm sure the data is not perfect but you'll notice that the runs are going downhill (thus, they are not healthy). The only exception is the Quillayute. The runs are increasing (maybe even approaching maximal returns) so why would we want to screw thing up a good thing by retaining fish.
Maybe I misinterpreted your post but is it really you opinion that WA rivers are in peak condition?????