The so-called "easy" pieces are not so easy if one wants to do a good job. I have no problem spending weeks on an "easy" Liszt Consolation, a Satie Gymnopedie, a Mozart Sonata, Chopin Prelude No. 4, always playing around with articulation, rubato, etc. to get it "just right". It's like meditation - winding down after a long day. All this is lost in virtuosic, fast-paced pieces (they have other issues, of course).
To me, true musicality shines strongest in those pieces that have few notes, because every single note counts, and if one doesn't get it "just right", it will sound awful.
I also find it quite astonishing that there are not many "good" recordings of the easier repertoire. There are plenty of recordings of the Gymnopedies, for example, but most of them totally miss the point (IMO). The same with other "easy" pieces.