Why not use every tool you have. If a measurement is off it doesn't guarantee there's a bad result but it points to something to check. In the end the final decision is subjective. It's the only way to put all the data one has into one decision.
But perhaps most important is to understand yourself. There are factors that must be there for satisfaction. You need to learn what they are or without them you'll never be satisfied. There are factors that are intolerable. You also need to know and recognize what they are or even a system that sounds good at first will ultimately not satisfy. I suspect you can miss a plus or two. But one bothersome factor and the system is a goner.
Audiophile use every piece of data available, both objective and subjective. But most important - audiophile know thyself. and that may be the hardest but most important factor of all.