The MCU formula is a litmus test in most people's minds when they see a comic book movie. Whether or not that's the correct method of viewing a movie - it definitely isn't BTW - it's simply a fact.
Your second sentence makes literally no sense. The MCU is Worlds of DC's primary competitor. People watch DC movies expecting a Batman/Superman version of Marvel. They aren't, and they never should be. Grounding someone's expectations to neutral by deconstructing their preconceived ideals is necessary for parity to be observed.
If Marvel was so great, why are half of their movies so mediocre? Thoughtless popcorn flicks, throwaway villains, and countless titles of trash on paper? Doesn't sound like such "greatness" to me.