There's no such thing as a perfect system, true - but for the purposes of this thought experiment we can posit this magical system has the additional magical property of sounding perfect to each listener. In other words, if there were an invisible, plug-and-play system that, when you turned it on and played recording after recording of your favorite music, made you say, "Wow, this sounds amazing, best I've ever heard, and I can't think of a single sonic aspect that could be improved," then how would that affect your enjoyment of the hobby?
For me it would increase my enjoyment because I'd be able to effortlessly listen to all my music with the best possible sound quality.
I recognize that for others this would not be the case, as they really like the tinkering/experimenting/upgrading/gear aspect of the hobby. And that's fine of course.
For me personally, I have other interests that allow me to exercise the kind of creativity and exploration that would scratch the "audio gear" itch, and I'd just as soon do that and have a perfect sound system to listen to while I'm doing it.