Many games rely on luck. Dice, slots, roulette, crash... Actually most played games are about luck.
I used to say there's no such thing as luck, but when someone wins the lottery, there's no strategy, no skill, just luck. You can't explain it in any other way.
I agree with you that we should treat these games as entertainment and it's best when people approach all of them, including skill based games, with such attitude.
It is really hard to explain the fact that luck does not exist and vice versa. In the games you listed, what can you count on if not luck? There is no strategy that can be applied. It's simple. You just press buttons and get the end result, which cannot be predicted in any way at all. I don't even try to understand it. I am captivated by the process itself. I enjoy the game and that's it. What else could there be?