Tire treads on scooters will wear down over time. How long it takes depends on riding conditions. In contrast to automobile tires, the treads on scooter tires do not serve any purpose other than for appearance and decoration. Treads on cars are present to make cars safer and prevent hydroplaning when driving at speeds greater than about 30 mph on rainy and wet pavement. The grooves serve to move the water out of the way allowing the tires to grip better. But in fact, on dry road surfaces, smooth tires without treads grip the road substantially better. Race car drivers know this. Their car tires are smooth. Click here for a great Wikipedia article that explains.
Scooters do not have any of these issues; they do not go anywhere near as fast as cars and puddles no more deep than you would walk through are perfectly fine to ride through.
These tires, while worn are evenly worn in the center and both are obviously pointed forward. They are not a safety or reliability problem.
These tires abnormally worn on the edges and center of the right tire is cupped. Plus, they are obviously not pointed in the same direction. These tires will generate some additional rolling resistance that will shorten the battery range of the scooter. The tires should be replaced and the wheels aligned so they’re both pointing in the same direction.