there is an implicit assumption that that the engineer and the performer want the purchaser of a recording to hear "something"
Well erm...Yes that is kinda the idea of music - generally your expected to hear something. I guess some people do use CD's as coasters and some people just collect stuff (memorabilia) but generally most people buy music so they can hear the music (which includes all its nuances of loud/soft/timbre etc.) Some people buy several versions of the same tracks - remixes and such for dance clubs are often more fun with better dynamic range. I can't see the majority of artists, producers and engineers not caring what it sounds like on consumer systems...