I have realised that a system for producing near perfect results will always have to be a very fluid system, which will allow huge flaws just as it allows high excellence. This system cannot be consistent, and its results will vary very greatly. That is the price of perfection.
I visualise it something like the difference between solids and liquids. A solid has a fixed shape.. that is a metaphor for a consistent result. A liquid doesn't have a fixed shape.. it can be streamlined into any formation.. but then it can scatter all over the place.
I will take the example of football... consider a club like Real Madrid... they have had glory as high as noone else. But when the times are bad, they can be pathetic. If you can win 4-0 against good clubs, then that same system allows you to lose 4-0 against poor opposition.