Lub, why does your approach to every situation involving detailed statistics exert a philosophy of people not needing to know something? "No one needs to know that, so we shouldn't offer that"; this is an errorneous philosphy. Scripters may need to monitor CPU and sometimes memory usage. Not only may they need CPU and memory statistics, but they need accurate statistics, which RTB does not provide. I understand how this graph is irrelevant to many clients, but it can be a very important tool to some people. Statistics, data, and knowledge comprise the philosophy of Kaphost.
Not realizing the desire of some for detailed statistics results in a misperception of reality. This is the same as Apple's anti-developmental philosophy: you don't need to know how something works nor may you know too much about how it works.
Accuracy to the thousandths place is not necessary but it just makes a little more sense than claiming that the server is using 0% CPU.