IF you don’t actually believe it, why would you do it.
I find it questionable for folks to follow some superstitions such as “don’t pick up a penny unless it is head up” or send this chain letter email to 10 folks or you get bad luck.
A few such as not walking under a ladder, can actually save you from getting paint spilled on you. But many are silly or questionable. IF you do something (or not do something) because you think it will bring good or bad luck then you are following a superstition.
Even if you think you don’ believe it. IF you keep up the practice you may find some random correlation to the good or bad luck and start believing in the superstition behind it. AND what if some demon causes a direct correlation for you, so for you the superstition holds true all the time because of some demonic influence.
Some things are perfectly innocent, but I would pay no attention to many of the little superstitions that some folks build up over time. Stuff like tossing a pinch of salt over your shoulder or not stepping on cracks and junk like that.