Landuse is pretty subjective. You might consider asking the original mapper, h551w, for their input through a comment here: https://www.openstreetmap.org/changeset/116846552. I presume you are referring to https://www.openstreetmap.org/way/1026567209.

It seems like the museum/event center area might be part of the park itself (like the Idaho State Museum in Julia Davis Park), in which case you could combine the two.