Used game stores have long ripped off gamers and cut into Sony’s profits. Get rid of the resale aspect and you’ll likely see sales increase.
That being said: I wanted to play Left 4 Dead on my Series X the other day and it’s not available for purchase on the Xbox store. You need a physical version. Which I luckily have.
If Sony, Microsoft etc want to promote digital sales over physical, they need to sort out the licensing. I don’t know of any issues like these with Steam sales. You buy it, you own it. Period.