It all depends on you personality and what you think. For me I belive in ghosts, black cats scare me, and will never touch a mirror around this day. Because it's known to be bad luck. Lol. That's why people are still superstitious, because of old tales that they truly believe. And it all depends on who you are.
I agree with you it's crazy to be superstitious
I'm going break 700 mirrors and house 30 black cats hahaha jk jk
13 is considered a bad luck number.