Theoretically yes, but many audio systems are compromised and many listeners tastes quite bizarre to my perspective. A wander around any high-end hi-fi show indicates just how wide the sample base is of what people view as acceptable or desirable. As such we all end up somewhere slightly different, in fact my answer is to end up in a couple of places as I’ve not heard a single system that does everything I want yet (I far prefer having both huge full-range monitors and tiny near-fields rather than some compromise in the middle). We also obviously buy a system to reflect our musical taste, and some people’s range is far, far wider than others, which almost certainly leads to different kit choices. To be honest it would really help all hi-fi reviews if the reviewer listed the last 20 albums they played!
PS Someone will obviously be along soon to argue that if ‘graph says flat’ then everything is perfect with the world, but I’d argue one’s interaction with music is way more complex than that and what makes listener A want to keep exploring new music may be different from listener B or some intellectualised theoretical ideal. I actually find looking at someone’s record collection is the best judge of their system, i.e. how much music have they managed to discover, understand and enjoy with that tool? That’s the real test!