The holosuite episodes were an interlude and a break from the overarching dominion war arc allowing the crew to do something out of the box and wacky. Even then they often covered relevant topics such as Nog’s PTSD. The heist episode is one of my favourite episodes in all of Trek.
If you like that one and you’ve never seen the original Rat Pack Ocean’s Eleven movie, do yourself a favor and watch it. It’s not deep, it’s not fantastic cinema, but it’s entertaining as heck.