Cus it's not 16:9
makes anything cinematic
but really because our minds havent adapted fast enough from the idea of low quality early socialmedia 2010s camera selfies being all the phone camera is good for but theres whole movies shot on iphone even then. All about the look you create and no one will tell really

ranked by significance:

80% lighting
5% composition
5% sensor size (depth of field, Dynamic Range)
5% camera movement
5% grading

Frame rate, movies have lower frame rate