I recall the idea that just like a jelly mould that has a dent all of the jellies will also be dented. Therefore just as Adam was imperfect we to would have the imperfection.
If a cook makes a Faulty Jelly, is it the jelly that would be blamed? No, it is the Cook for using sub-standard tools or materials.
The same is true with Adam, the faulty materials should have been replaced immediately, it is no good blaming the offspring of Adam and making them pay for his faults.
I never could understand the suggestion that we had to pay for Adams sin.