This isnt the only antipattern I notice with Netflix, but its one thats actively harmful to peoples hearing.
Why?
Movies generally tend to have a high dynamic range. That's how they play in the cinema where action scenes are supposed to stand out from the dialogue and that's how many people want them in their home theatres as well.
I personally did not notice anything special with the audio on Netflix.
For what it's worth, in my opinion most TV speakers are designed to be awful because they either point the audio down or backwards and the sound is guaranteed to sound more muddled than the original signal because it's bounced around before it gets to you.
You need forward facing speakers (preferably with a dedicated center audio channel as in a 5 speaker surround sound setup) to get the maximum benefit.