I respect those gamblers that thinks they are lucky because of what they do and believes in superstitions. We can't blame them, I was one of them before but you are right, they are making a big mistake it's either they really don't know that there's logic and it's just a coincidence that they've won.
There is nothing we can do but respect other people, if we laugh at them, they may feel offended and may start an unpleasant stuff between you and that person. Eventhough we both agree that superstition is just some mind stuff, we all fall to this kind of thing. I do have superstition before but then I just laugh at myself whenever I think of it today.
I also confirm with that and with modern age today, superstitions linked to gambling references was just a mythical beliefs inherited from other gamblers family line. There was no mere fact proven to those superstitions who happen not legit to acquire truth to some who believes it as help to them in winning. But the actual scenario doesn't provide any advantages here and worst is very frustrating to the gamblers who loses more money