Yeah. Not everything has to be a movie. If you want the little dudes to do exactly what you had laid out for them, get some action figures man. If you want your players to play on the playground just give them some toys, a rough objective, and let 'em run around.

If you want your players to interact with something, make it either related to something they already care about and actively want to achieve, or else thrust them into the middle of it without any choice about it. If instead of that you turn them loose in the dungeon and they just run around having fun killing monsters and having hijinx then there is nothing in the world wrong with that and it is the expected result