1 & 2) well if you're not going to concern yourself with what other people like and need in your quest to get people to agree with you, isn't the more accurate statement that you find that you are perfectly fine without your pinky? 5) why would I make a prosthetic for an appendage I already have? keeping the pinky sounds like an easier, more sustainable option than hacking it off and then creating another one.
unless you mean to make a race of golem pinkies, then that's an entirely different story we're telling.