To elaborate, much anime is not brought to the us, only popular ones on platforms such as crunchyroll. Manga is nearly nonexistent in the us. That means the only way to get them is piracy, crunchyroll, or import. Most people who watch that content outside of japan don't know japanese, so scratch import. Crunchyroll makes you pay to see next episode, and fills their anime with ads to an unbearable point for a free user. Scratch that. Therefore, piracy is left. And so people pirate. If they would have a tv channel airing anime in the us, piracy would drop.