Why has no one ever cared about Batman's true identity?

Marvel comics and DC are the main superheroes in American superhero movies. Marvel's superheroes include Captain America, Hulk and Iron Man, while DC's superheroes include Batman and Superman. Batman, a popular hero in DC, has been made into a movie many times. Nolan, a famous Hollywood director, has never surpassed the Batman trilogy, especially the second part of The Dark Knight, and has become the ceiling of a series of superhero movies. No matter from the depth of conception or acting, almost no superhero movie can surpass this one. Gotham city, as the main city of Batman's activities, also shows its gloomy and horrible side in the film. This is a creepy place, but no one is interested in the true identity of gotham city's savior. Why?

At first, the young Batman was in Crime Lane. Just after he came here from the opera house with his parents, he witnessed the scene of his parents being killed. This was the beginning of Gotham's fall, so he put on his coat and became a dark knight, haunting and fighting criminals at night. Gotham began to decline because of the death of his parents, so everything had to be saved by himself. Although he has no super power, he still has enough strength to crack down on criminals with his earning power and his strong perseverance.

The place where prisoners are held in Gotham is called Arkham Madhouse, and all prisoners caught by Batman will be sent to this place. And what is the police station doing? Their crackdown on criminals is too weak, so many things can only be done by Batman. As a department for maintaining local public security, it is obvious how incompetent the local police station is and how chaotic gotham city is.

For the police, Batman is their shame, because the more criminals Batman strikes, the more incompetent they are, so they don't even want to mention Batman, and no one wants to know Batman's true identity. For the people, Batman is just a legend, and its existence is uncertain. So nobody cares about Batman's identity.