Hiding the wires in engine bay

I am rewiring a car right now that had this done. What a mess. They used a painless harness integrated with the factory harness.

What is so cool about Hiding the harness? I think it is a stupid Idea. If anything I would want it easily accessible.

The one I am doing now burned up due to this stupidity. To each his own I guess. Just more income for those who have to fix these messes in future repair bills.