Jokes aside, as long as it's not hurting anyone else, I don't actually care how people spend their money. If I had enough zeros on the end of my paycheck, I'd probably buy stuff like this as well. Because, why not? A coors or grateful dead reel is awesome in a goofy sort of way.
We all buy our own version of silly things. Some folks just have more cash in their wallets. And at the end of the day, this is still fly fishing gear. I find that far cooler than expensive watches or purses or cars that some folks spend money on.
To each, their own.