Why there is no foolproof method?

This would be a great one for Dr Ramshaw to answer. His lifelong research interest is this problem.

He will tell you that it’s because hernias and our individual bodies are complex systems. A mesh repair in one patient will act differently in another patient even if performed exactly the same. Until we can approach it with this in mind and determine the best modality depending on the specifics of each patient (cancer treatment is finally moving in that direction), then the problems you present will remain.