I don't think they realized that's what they were doing.
If these aliens aren't capable of understanding what they were doing, how than are they capable of understanding the concept of 'help'? If these aliens had this kind of power but lacked the knowledge of what 'fiction' means, these aliens should have destroyed the galaxies by now.
There's really nothing creative going on here in this episode. All I see here is Maurice Hurley taking a story and stripping away all the creative parts just to make a "Crew trapped in a casino" story and that's it. Anything involving questions as to why anything is happening is simply written off as "We may never know". Again, those types of plot devices aren't a bad thing, but it gets to the point where there is so much of it going on that you really get the sense that the writers are just being lazy. And you can't really paint these writers as the creative type if they think ending the episode with Picard saying we may never solve Fermat's theorem... even though we did.