Well, in order to understand this issue well you really need to know statistics well. I cannot teach people that, but those who know will understand. Also, math is not a religion, so there is no "believe in" it or not. Math is correct or not. If someone can point out where my calculations are wrong I will be happy to review them.
I opened a ticket with Inno support and they confirmed that it is 1/9 chance to get a blueprint. But the examples I find online do not support this claim. However, I can agree that the screenshots I am finding are not real, but fabricated. The only example I am sure of is mine, and it does not support Inno's claims.