Is room acoustics important? Yes, but system synergy, level of components, quality of power, cables and vibration control are equally important.
I think that we have to acknowledge that different audiophiles claim to hear differently. I’m amazed at shows how audiophiles make claims about judging cables and electronics in horrible rooms.
I don’t know if they can actually hear THROUGH the crap or they are just suffering from self-delusion, but one thing I know for damn sure is I cannot.
So for me, that statement doesn’t match my reality. I have to have a good room first or the rest is nonsense.