First, how did we model the bending tolerance if everything is just randomness? Second, there are other algorithms that constructively find a solution and don'

First, how did we model the bending tolerance if everything is just randomness? Second, there are other algorithms that constructively find a solution and don't work at all like genetic algorithms, such as mathematical solvers. Third, sometimes, a design is also simply thought up by a human, based on their own professional skills and past experience.