I don't see how that's a problem. From the attraction's perspective that's repeat business, and a good thing. From the buyer's perspective, it's more time you can spend checking out cool dioramas.

I dunno, to me there's always part of me that is a bit sad when I realize I've experienced everything a particular attraction has to offer. It feels like there's no reason to come back, and then it becomes just this thing I did once. The mystery and wonder is all gone, yknow? Whereas, if there's stuff I haven't seen, even if I never go back again, I might learn about it later and then it's a little bit of that wonder all over again. "Oh wow I never saw that! That's so cool!" etc.

This might be one of those things that's just personal preference, though. Maybe other people like knowing they experienced everything.