In the process of building a system, you

In the process of building a system, you must devote time to asking questions about it (both literally, and by way of benchmarking and probing). Do not get so lost in the building that you lose sight of the goal.

This is related to bugginess. Some bugs are inevitable, but the care taken to prevent bugs must be measured so that you maximize the goodput of your system. If instead you fall into the trap of building features only, you are chasing the wrong thing.