I have seen videos of small turtles going really fast on tiny skateboards. All of a sudden, they become a fast animal and seem happy with it. A bit like human w

I have seen videos of small turtles going really fast on tiny skateboards. All of a sudden, they become a fast animal and seem happy with it. A bit like human with a bike or a car. Feels like evolution is not as perfect as we want to believe sometimes. Could something similar happen with sloths? Maybe their eyesight would improve quickly?