Antonioni's films were less reliant on drama and literature, but does that mean that they're the only meduims with depth? What about painting, photography, music, sculpture, dance? Are they superficial?
Antonioni minimized drama as time went on, true. That was a good thing. He was able explore how to get across ideas and emotions through images and sounds. Images and sounds....isn't that all a film is...hmmmm.....maybe......
What he proved was that the 19th century novel narrative style and theatrical performances are indulgences-not obligations. That was a revelation. His films were never hollow. They were the most passionate films i've seen. He was acclaimed by Jean Renoir, Fellini, Kurosawa, Godard, De Sica, Scorsese, Coppola, Lumet, Altman, Kubrick, Tarkovsky, Rohmer, Rivette, Andre Bazin, Pasolini, Satyajit Ray, Kazan, Wenders, Wong Kar-Wai, Alfred Htichcock, and many other masters because they were were moved by his films. They had no obligation to admire his movies!