Yes. In my experience, hi-fi enthusiasts almost entirely overlook the importance of addressing acoustic issues caused by the room. The ones that do, often do too little and in ways that are ineffectual.

Granted, the space is not easy for people to intuit on their own. It opens the door to a lot of terrible ideas that get propogated by people who don't know any better.

Source: I design and build high-end recording studios for audio professionals.