Audio is already very carefully scaled for this because you wouldn't want a large explosion at the actual decibel levels in your living room--neighbors who live blocks away would call the police to report an emergency. ...but the difference between a whisper and an explosion on TV is called "dynamics" and if you compress everything to make it relatively the same volume, the audio becomes bland and stops being impactful, or worse, it becomes heavy-handed. Faint background music that's used to set a mood suddenly becomes overt and intrusive. Every bus or car ride becomes a chaotic mess of noise in between the primary character's spoken lines.
Some televisions support compressing their audio although just as often it's only impacting the bands where human speech typically exists, but only slightly because by and large it simply makes things where care was taken in constructing the audio notably worse. Advertisers need to stop trying to force people to listen to the commercial from their bathrooms--unless they're selling toilet paper, it's just being intrusive and wildly inappropriate.