I think there are plenty legit reasons to pirate, but I do agree that it isn't ethical. The thing is, I'm not a 100% ethical individual and I'm OK with that, it's not like I'm supporting a drug cartel by buying illegal drugs or killing someone, I have a threshold I consider acceptable for myself. At least I'm not the type of pirate who thinks they are saving the world by pirating content.
Some people think their acceptable threshold is drink and driving. My personal threshold is downloading a movie that the 3 streaming services I'm already paying for don't offer. Pretty vanilla if you ask me.