And even the "old ones" (Osamu Tezuka? Yoshihiro Tatsumi?) were not always that dense. Just look at "Shurayukihime" written by Kazuo Koike and pencilled by the late, great Kazuo Kamimura - it was light on text but visually it was nothing but a stunning work. Just like modern artists such as Hiroaki Samura (Mugen no junin) or Tsutomu Nihei (Blame!) create.
And yet I still can enjoy "stupid/empty" manga such as "Bleach", "Magister Negi Magi" or "Kaibutsu Ōjo".