No coincidence. On YouTube, you can watch videos explaining how each slot machine is perfectly designed to maximize profits. Casinos try to maximize profits in all games, but there are others where this is much more difficult, such as table games. Slots are the most profitable for the casino, as the design they use works best to maximize profits.

I say this even though I occasionally enjoy playing slots, but I am very aware of what is involved. I play very occasionally and, for example, I turn off the sound, as this is another aspect designed to get you hooked.