@amir_asr just stop with the holier than thou attitude. You’re not some all knowing savant.
I have a good understanding of acoustic treatments. Like eq they remove the room from the equation. Yes engineers and producers want a dead environment so they can isolate vocals etc. A psi avaa or minidsp or bass traps all have the same goal. They are just different paths to that goal. Room treatments are ugly but they aren’t some snake oil product. They work. I’ve seen them work just like I’ve see room equipment on Dutch and Dutch 7cs work.