Exactly, which is why a DPS meter isn't needed. We already have the tools for those interested in using them. It does exactly what you want it to do without offering the chance for misuse that an in game meter would, so it's the best of both worlds.
Cept some of the people who would greatly benefit from deconstruction and analysis claim they don't need to, they THINK they're absolutely amazing, the meter would be a necessary eye opener for them to improve.
They think they're one of those rare guitarists who are amazing at playing by ear, don't need lessons, don't need to learn to read music, and certainly don't need to use tabs to play the guitar, but they're not, most people can't do that. They need to be recorded by someone else and play the tape back for them for them to realize, hey, I'm not as hot as I thought, maybe I should learn to read music or at least use tabs. (going back to the Cstats = reading music, in game meter = tabulature, and only a rare few very talented people do the right thing just by "feel" analogy)