Yup.My post said it depends on the game and you can find examples to suit either argument. But let's run with this one. You can buy RDR2 second hand for $51. You can play it for a month. You can then sell it for...what...$40? Total cost to play the game is ~$10. Or going with those prices, you can buy new for $60, play it, then sell it for $51 for a cost of $9. That's $9 to play it now rather than waiting until RDR2 is $9 in a digital sale, if it ever drops that low. For the really hard up, this is the most economical way to game. They can also not buy new games and buy old, super discounted games. By including a drive, they can use both physical and downloads for whichever is cheapest. Excluding the drive means excluding the physical options.
I'm not arguing in favour of keeping the drive, but pointing out no-one has sufficient data to know the best course of action, empirical experience is not statistically relevant data, and a fair argument can be made for the running cost advantages of keeping the drive.
As long as you can wait, you can be the outlier on a standard distribution of used game sale pricing. There is effectively an entire industry around used game sales, it must be very profitable if they can continually buy and sell games and still take some off the top.
Hell I find games for $1 in the bargain bin. If they've managed to make profit there then, wow.