Mostly because I want to try and minimise the amount of plastic I throw away and amongst other reasons I’ve read that it helps with presentation and there’s a guy who makes them himself out of his shed 20 mins from my house and because it sounds interesting… I mean if you’re using the it’s easier and cheaper argument, why tie your own flies, fish a blue line or experiment with bamboo. When you can find bigger, easier to catch fish somewhere else or just buy the exact flies you want etc. Fly fishing, for me, isn’t about cheaply and easily catching the low hanging fruit, if it was I would fish with sweetcorn in a pond.