TV and film are simply two very different mediums, and Rich Gelfond in his comments to Deadline seems to believe that consumers want blockbusters out of their Marvel ventures, not television pilots.
Marvel movies tend to be grand blockbusters teeming with special effects and dazzling stunts.
Budgets are big and fabulous box office returns are all but guaranteed.
With relatively few exceptions, budgets for TV shows are generally much smaller than for movies, and many lack the cinematic qualities that make for a good big screen movie.