So they want Sony to be required to sell slightly discounted codes to resellers who then sell them to consumers? How does that matter to anyone besides resellers? I guess the resellers could pass some of that discount on to consumers? This seems like a pretty irrelevant concern since Sony is has no state granted or effective monopolies in game sales, they aren't a common carrier, they aren't benefiting from access to public right of ways or other exclusivity that gives them a market advantage that citizens need to be compensated for. I don't think this matters and I don't care about this.

It matters to consumers because businesses have greater financial power to pressure Sony into reducing prices than individual consumers.

Additionally, businesses will not only sell Sony codes. They won't be like car dealerships, tied to 1 manufacturer. Due to this, they'll have even greater incentive and negotiating position to pressure Sony as if Sony doesn't want to play ball, the sellers can start promoting non-Sony products to consumers.

With direct sales only, Sony can have perfect vertical integration: they make the console hardware, they make the custom OS, they own the game publishers, they own the developers, and they own the store that sells games too. That's beneficial only to Sony.