Yes, Gierach is a whimsical philosopher in his own right. There is a lesson we could all learn from the Lyons incident he cites.
Yet meaning no disrespect to John, I can't help but get a bit defensive when it comes to the welfare of rare indigenous species and stocked fish... I lose sleep at night if I get thinking about WD and native steelhead, cutthroat, etc. Sure, a holdover population might recover from a fresh stocking even if deadly parasites are involved, but a fish who swims a 7,000 mile circuit from a mountain spring creek to the Bering Sea and back can't afford another deadly force working against it. (end of obligatory serious note)
"Flyfishing is like golf but you can eat the balls" - JG.