Just as long as the room is not an empty echo chamber, but instead is fully furnished with both absorbing and reflective materials, then I do not see the issue. I have none of this BS in corners and hanging from my ceiling. My room sounds just fine to me, thank you. Most of us live in a normal house with a family, not in a mansion with dedicated areas for listening. There is something called a compromise. Most all of this expensive dedicated so called acoustic treatment, not to mention ugly, can be accomplished with common household items that are normally contained in a typical living room. Soft and hard furnishings (ie...upholstered couch/love seat, chairs, coffee/end tables, pillows/throws, wall hangings/tapestry, curtains/blinds, stuffed bookshelves & record shelves, carpeting, rugs...) etc, etc...doing anything further borders on excessive and insanity. The manufacturer of the speaker did not set out and design it to be listened to inside an anechoic chamber.
https://www.hearingaidknow.com/quietest-room-anechoic-chamber
https://www.hearingaidknow.com/quietest-room-anechoic-chamber