I'm afraid so. What I'm trying to say: A speaker can be as good as it may, it can only play as good as the room / the placement allows it....Or maybe I misunderstand what you are describing or seeking???
Most people have no idea about how to measure room response, so guidelines like those from Neumann I had linked, are very helpful.
Many other manufacturers seemingly don't bother. We are not living on a planet of mathematicians or acoustics engineers.
How do I model my room, an L-shape with a "slanted" middle section, open towards the rest of the house? Formulas made for rectangular shapes don't fit it. I can only place my speakers according to the manufacturer's guidelines, so I'm happy to have these guidelines - not perfect maybe, but better than playing "trial and error".