I think that sometimes superstitions might help you create good habits, like for example you always do a routine a specific way, because if you don't do X, then it's bad luck, etc.

On the other hand, if you just are just scared of the world because of superstition, then it's bad for you.

I like to get cheaper deals based on superstition, say staying at the 13 level in a hotel, flying on Friday 13th, etc. Or the same but with 4 in Asian countries (tetraphonia)