There is nothing wrong with stepping over a cat if they’re in the way (as cats so often are). You do so at your own risk though. I know with my cats, most of the time it’s simply too hard to resist reaching out and grabbing at me if I step over them. The issue with this is that their claws will get caught in my socks or on the bottom of my pant leg. This causes me to try to get my balance back while neither stepping on them or dragging them with me as their claw is stuck on my clothes!