Pirate movies were more prevalent decades ago, but nowadays it’s pretty much just Pirates of the Caribbean.
Disney’s five Pirates films have made over $4.5 billion worldwide and the company may own the brand Pirates of the Caribbean, but the Mouse House certainly doesn’t own the concept of pirates.
Hollywood is a predictable beast in that success breeds imitation; the MCU’s popularity is why you see so many comic book and superhero movies coming to the big screen, and Game of Thrones’ impact is why every streaming service is working on expensive high fantasy shows.