Why is playing roulette better than slot machines?

It seems like an obvious question, but many players think the opposite.

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Roulette expectation is -2.7% and this cannot be changed. Of course, we are considering normal roulettes in normal online and offline casinos. In slots, everything depends on the accumulated gaming bank of the machine and the set pay-out. Even in land-based halls, they manage to reflash the boards and set 60-70% return. In roulette, catching a coefficient for a spin x10 x20 is not at all uncommon, unlike machines where you can wait in vain for a normal combination all day. In roulette, everything depends on the player, and in slot machines on the generosity of the casino.