You can make a point without being obnoxious.You appear to be living in audiophile cloud-cuckoo land.
If -30dB of digital attenuation is causing "a thin and sterile sound" or, indeed, any other substantive and repeatable "problem" with the sound quality, you are experiencing the effect of other issues.
Are you aware of just how far down in the dirt the data below bit 20 actually represents? When you are listening quietly enough to feel that things are bass-light, it's quite probable that 8 bit audio would be quite sufficient*.
And if you are listening at low enough a level to be worried by a lack of bass, you need some bass boost from somewhere - it has nothing whatsoever to do with attenuation, digital or analogue.
* The range between threshold of audibility and instant hearing damage is about 90dB. 20 bits allow for a dynamic range at least 10dB more than that, 8 bits give you 50dB, give or take.
I know what my ears hear. So did many people in this thread, who experienced some sound degradation due to excess digital attenuation.
The fatal flaw in your assumption is that everything else in the signal
chain behaves perfectly. Which has never been the case.