Well, we tend to "worry", overthink, and talk about a lot of things that we can't really "hear".
For example, people compare electronics with SNR, THD, Crosstalk numbers. In real life, we can't really hear the difference in these. But we still talk about them all the time.
The "standard" frequency response is +/-3dB, but can we really hear the difference if it's +/-4dB, +/-5dB, or +/-6dB? Yet, if a speaker has a FR of +/-4dB, +/-5dB, or +/-6dB, a lot of people will probably say that they won't sound great just because of those numbers.
So would you buy an AVR with SNR of 120dBA and THD of 0.001% or an AVR with SNR of 70dBA and THD of 0.1%, even though we can't hear the difference?