Cowhide comes from everywhere in the world.
Argentina and Brazil have huge beef industries, where hides are exported.
The pigskin in China is of good quality.
England produces many high-quality leathers, especially vegetable tanned ones.
US leather may have many healed scars.
But there are also many places in the world where livestock life is easier and there are almost no scars.
Leather with serious scars can also be used to make Nubuck.
It is very common to cover scared leather with polyurethane coating, and then emboss it, which is what you should think of when you see the statement of the first layer of leather.