Or you can hold 4,5,7,8 and hope to get a 6
See, at least there are four scenarios: straight flush, flush, straight, and two pairs.
You can win or lose depend on your decision, it means you can make poor decisions -> guilt, as if you lose because of you, not the system/luck.
Ordinary slots don't have this expand payline, gamble feature, lock reels, etc. The only guilt was why didn't I increase/decrease the bet.