Further, why isn't anything at risk? Infinity War got about as close to real risk as any MCU film has so far, and I think if Mr. Scorsese watched that film he'd realize it's actually possible to create emotional drama within the context of a "Marvel Movie".
Also, are we really drawing the line arbitrarily at Marvel specifically? Where does "Joker" fit? Watchmen, The Dark Knight, Wonderwoman, 300, Scott Pilgrim, V for Vendetta? What about undeniably "Marvel" films like Logan, and Into the Spiderverse? Do we dismiss all media sourced from the pages of comics, or just the MCU specifically?
I ask both to make a rhetorical point, and because I genuinely don't understand. Mr. Scorsese writes this opinion piece like there's a shared understanding of what a "Marvel movie" is, but I don't know that there is such an understanding.