2 things.
1. Newer visitors. Like me. We've been going since 2010 but are not-great park tourers. So there are whole swathes of parks we haven't experienced yet or fully. And at the very very beginning of this stuff, I was alone st Epcot and saw a FP for that ride come up. So I got it. And rode for the first time. (This was the Superbowl day when the Seahawks won, so whatever year that was). I'm quite sure there are tons of "me" every hour of every day.
2. longtime visitors who have thought it's been closed for years. Like my cousin and her family. They generally tour with us on our visits, and had told us that that area was long since closed. We would point to the sign and map and they would say that Disney just hadn't taken it off. At some point they'll go back and I'll tell them, and they'll enjoy riding again.