Pirates (at WDW) is indefensible and I genuinely don’t understand why people enjoy it. But that’s for another thread.
Because it's a quality ride?
Sure, it's not as good as the one at Disneyland, but most people haven't experienced both. It's still one of the 15 or so best rides currently existing at WDW. It was my favorite ride at MK as a kid (although I liked multiple EPCOT attractions more).