There is a great benefit to using tools that make the work we do easier that no one has mentioned, and that is the decrease in MSD's. Many folks that are very good at footlocking experience debilitating injuries over the longterm in this industry. I have been a climbing arborist for 33 plus years. I've never been fast at it. I've never been much of a footlocker. I haven't ever had the need because I've always gotten a fair price for the work I do. I don't base my wage on speed. An advantage to also being the "Boss" I suppose. I am the one that dictates my price, not the client. And I choose not to "compete" with the other local tree businesses. I own a Wraptor.The setup time is not all that much longer than setting and isolating a climbing line for footlocking and tying a prussik. It allows me to climb more than I did prior to the purchase, without needing a day off from climbing to recuperate. this profession is not kind to the human body. What might seem like a great way to stay in shape in most cases is just the opposite. Most aspects of a climbers day are causing damage that may not become apparent for years. Then the cost to repair, if possible, far outweighs the cost of a tool like this. My 21 year old son, who can footlock pretty well, also uses it to ascend into the trees we do. His attitude has been one of " This tool will let me be more productive over the course of my carrier, allow me more years to be an efficient climber". As for enjoying the ascent for some, I would never argue that point. Or not wanting to listen to or breathe the exhaust from a two cycle engine either. I get that part for sure. But engine noise and exhaust is part of what I do. Hearing protection solves part of the problem.
I say "to each his own". Like anything, if works for you, great. If not, no worries.