First, it's all subjective. For example, what you might see as acceptable performance might very well be a much higher bar than what others do. I would argue that's the case for most of us at WBF.
Second, a room's performance capability IME is mostly limited / most challenging in the bass region. I'd argue most people have not heard what truly accurate bass sounds like so they don't know what they're missing, which gets back to #1. But at the end of the day, I'd wager for most folks that walk through audio shows, they don't know what they're missing and as such, they don't realize the magnitude of deleterious effects of poor rooms / poor room setup, so much is a wash from their perspective and as a result, the system matters most.
Final thought - over the years, I've experimented with my office system of the moment in my main 2 - channel well set up / room treated room and of course, the system sounds better in the larger treated room, but is it transformed to be better than it's price? No. In fact, the larger room requires high playback level (distortion) for the same SPL and bass impact is greatly diminished. There is no free lunch.