Tooling and impact
One of the fundamental natures of physics, as well as a rule that you learn straight away in industrial engineering, is that you cannot observe or measure events without in some way impacting them. In computing, we face the same problem. If anything, we face it far more than in most other places.
The more that we measure, log, or put metrics on our systems the more of the system resources needed for our workloads is taken up by the measurement processes. As computers have gotten faster over the years the ability to measure without completely crippling our workloads has become more common and now, we often even track checkpoints inside of applications in addition to operating system metrics. But we always have to maintain an awareness of what this impact is.
At some point there is more value to just letting the systems that we have run as fast as they can rather than trying to measure them to see how fast they are going. A sprinter running flat out is faster...
