Most people aren't audiophiles, and either don't care, or can't tell the difference. I listen to music on my Echo at home all the time, and if I'm missing something great, I certainly don't know it.
You're right.
Listening to music on my Echo offers many advantages, even though I have a high end dedicated home theater/audio experience in a purpose built room.
When moving around doing day to day tasks at home, music is in the background while our focus is on the task at hand, or on conversations etc. Therefore it's the ease and convenience of Amazon Music as delivered by my Echo that's especially satisfying.
Amazon Prime in concert with my Echo is simply priceless!
A brilliant plethora of goods and services that is an amazing time and money saving system. By simply spending a few short minutes periodically, to program Echo, as ideas come to mind, it's functionality, usefulness and overall value has skyrocketed.
Echo controls my heating / ac / security inside and out, monitors refrigerator, refills groceries, pages Uber, plus serves as our central information center, communications hub, weather station and more. It's comprehensive abilities via IFTTT turn it into command central.
It's clever ability to pick out my voice even amongst several others talking is stunning. I can speak softly from sixty feet away amongst the din of other ambient noise and it executes my commands flawlessly.
Thanks Amazon