Unfortunately, there’s a natural tendency to think that a more fully-featured product is “better” than one that is more pedestrian. In many cases this is correct, but in networking there is a serious tradeoff. Managed switches have lots of useful features, but with those features comes a need for “management.” These are not set-and-forget devices and in some cases require consistent care and feeding to keep them working correctly. This is well beyond the capabilities of a lot of people and can get into some concepts which are second-nature to networking professionals, but extremely confusing to those who do not have that background.
The features brought on by managed switches are rarely needed in a home environment. I can only think of a couple of cases where there was no other way to solve certain problems. As long as someone was available to look after them they worked well.
Unmanaged switches are fast, reliable, and they are truly plug-and-play. For the vast majority of people this is all that is needed.
Finally, just to be perfectly clear. There is no performance advantage in an audio system to using managed switches. None whatsoever. In fact, they can often reduce performance when misconfigured.