We don't really need slot machines everywhere these days because put simply everyone is glued on their phone and gambling is accessible through there.
It's as you said. Now, anyone can access a site and gamble from their home, bar, beach, or wherever they are. However, for the owners of establishments like bars, putting slots is an extra income for them. And a good one if someone stuck with it.
Slot machines being installed in random places is still a thing albeit illegal in most of the world where there is any regulation. There are very few places in the world that you can find slot machines outside of licensed physical casinos that are dedicated to being a casino and nothing else. Hell, many places even go after claw machines and such for being too much like gambling. It's better to keep it this way imo. Slots aren't a children's toy although they look similar.
It's a fact that by putting slots everywhere, gambling will increase and problems will arise like mushrooms. No Government wants this to happen. They need to have it regulated with specific requirements to avoid any problems, like kids' curiosity.
So when you go buy groceries with your need they don't need to look at this.
True, but they will see the lottery tickets, the scratch cards, or a monitor showing Kino...
