Revenue not gained =/= revenue "lost".
It's a problem I'm seeing with publishers. People whine a lot about entitlement issues with gamers, yet I'm starting to see some blatant signs of entitlement issues with publishers as. They love to think anyone who plays their game automatically owes them money, which isn't at all the case in this or any industry. Used game sales, borrowing/lending games, trading, etc., is neither illegal nor morally reprehensible, and I highly doubt it's nearly as much of a problem as publishers like to make it out to be.
No one is saying it is wrong, but it is still perfectly reasonable for a company to want to maximise profits, an easy way to do that is to encourage a person who would buy it second hand to buy it new instead eg with the play pass or in-box dlc coupons. What is wrong with wanting to sell as many of your product as possible.
Anyway, there are differences to this business than other ones, as there are ongoing costs eg hosting servers, patches (yes I know they should be released faulty in the first place, but they are) and some provision of free dlc etc.
once a book is printed that's it cost wise to the publisher. For cars the manufacturers can continue generating income from second users from manufacturer dealership servicing and selling parts etc.
Yes, before you say I know this isn't exhaustive but it's late and I can't be bothered thinking it through any more, but hopefully you get my gist.