*shrugs* that's just my take on it.
EDIT:
I was going to just leave that there, but do you know what? You've been bloody rude.
What progression? Progression in ability to move about.
I don't know how long it takes to get a drop of evil, but good for you that you had the ingredients for two withers. Have a cookie.
I have no idea what you mean by "double dipping" but I'm going to assume it's something offensive.
Aww. You poor thing. Yes, you (shock, horror) have to go to some effort to get the ring. No it's not for "no reason", it's to make the Angel ring. This has been stated.
The lowest tier jetpack runs out, FAST. And you clearly have no bloody idea that not all "flying" is equal. Jetpack flying can be tricky, hard to control, and occasionally terrifying if you're low on fuel. It's a very different experience from the fully controlled, creative-style flight given to you by the ring.
So YES. PROGRESSION.
I'm assuming you're rolling around on the floor because you're too lazy to make the ring. Ah well.