You have to physically be in the arcade. You playing on the machine means no one else can use it. The cabinet was a relatively expensive piece of hardware. There wasn’t generally an element of FOMO (most cabinets in an arcade could be expected to be there next week). Games in an arcade were generally not gambling or were not activating the same part of the brain in the same way a slot machine would.
Virtually none of this is true for something like a limited time banner for a gacha. There’s no barrier to access or scarcity. There isn’t a third party operator that owns the game or specialized hardware that you, the player, have to interact with. The banner is limited time for FOMO and pulls are very much gambling. These differences are why one is predatory. It’s not that money exchanging hands part, it’s the predation.