Because a ROA doesn't come chamfered proves it's not worth doing? Seriously?"
Seriously, "YES".
If chamfering was value added, Bill Ruger would have done so on the ROA. They are the chosen revolver for line pistol shooters at the National level.
Bill Ruger designed the ROA and took the proto type to Friendship and passed them out to let the revolver shooters try them. After the shoot he offered to sell them at his cost, each shooter who used them, bought the one they had shoot.
Uberti 1858s are the "As Issue" pistols of choice at the national level.
None of the above have chamfers.
Did Sam Colt chamfer his cylinders? Seems he know how to design pistols, did he not?
Can you let us know which major or custom makers chamfer their cylinders?