I think you need to learn the foundations of copyright in this country. They are not what the industry and its government pawns have led you to believe.
You’re still not getting it.
You can infringe a copyright without stealing income from those in the chain of payments for purchased discs. But those who infringe a copyright in order to make income for themselves also steal income from those in the chain of payments, as do those who buy their discs from the infringers.
Many of those in that stolen-income chain are not the copyright holder. They have made contractual deals, either as individuals or as union members, that include a percentage of the disc sales. They have not been infringed because they never held a copyright, but they have been stolen from, with regard to lost income.
When you make a safety copy or a convenience copy of the disc for yourself, you are seldom stealing income from those in the chain, because you weren’t going to buy another copy anyway.
Yes, some of the purchasers of the infringers’ discs wouldn’t have bought full price discs either, but how to figure that number is pretty much impossible, IMO.