We can be right in many way, but sometimes two statement cancel each other when it is done in the real world.
1. The more you play the more it is likely you lose as long you not have an edge.
2. It is of no use waiting for eight reds before betting black.
Say two players go to a casino and the do not have read the first advice, or they do not care or think it is true.
One of them have read the second and think it is right, the other one do not believe it is true, he think it is better wait out 8 EC before starting.
Both use Martingale.
Who has the best probability to end the evening with more money than the other?
It would be the player thinking it is of use waiting for 8 reds before start. Not because he is right to the second advice, but that he witout knowing follow the first to some extent.