While I understand your point, looking at your signature then I think you should understand this more than anyone. Sometimes its just nice to buy something new... even if you don't "need" it. Thats how I ended up with an iPad Pro in the first place. (Apple didn't upgrade the Air 2, I stumbled on to an amazing Pro deal and so I bought something I didn't need.)
The pencil was actually a big selling point to me because I imagined all the amazing things I would do, all the YouTube drawing vids I'd learn from and all the workflow advantages I'd experience. But in the end then, like many others, I used it for a few days and then put it in a drawer.
What actually turned out to change my workflow was the keyboard which I got much later. I assumed it would be a novelty just like the Pencil but it turned out that having a keyboard indiscreetly attached to the iPad at all times was very convenient.
The point of my personal history lesson is that I would never have found out what works for me if I didn't simply take the plunge and buy something I didn't need.
(That said, I've been trying to dump the whole package in favor of the 9.7" Pro. Despite its shortcomings, I do feel a smaller tablet would make the pencil more practical for my "casual user" needs.)