Many of the Products produced to be used in a Audio System are tried during R&D stages in dedicated demonstration spaces.
These Spaces are all about not producing sound that is being corrupted by the types of condition that are to be met in a Typical Listening Environment used by a purchaser of goods.
Once a Product is purchased, there are some products that are not designed to be at their best presentation when used in their new environment. As the end sound can't deliver as it had at the stages during the design, due to the influences caused by the Room and Set Up within the Room.
Room Treatment is a simple method to attempt to enable a end sound be produced that is a resemblance of a Sound be created during the design stage.
Note: resemblance to the produced sound is the key word not, a match for the sound produced during R&D Stages.
To not attempt to optimise the room for the audio equipment in use is absolutely fine, music is still being produced.
To attempt to optimise the room for the audio equipment being used is also absolutely fine, music is still being produced, but possibly ? with less influences produced by the room and room set up.