Sony would have more digital sales if they didn't fuck with people's libraries. The only way to be sure that you can still play some PS games is to have a physical copy.
Any time a company says "People don't want x" what they mean is "We don't want people to want x", usually due to money, effort, control, or a mixture of the three.
Because it all routes through one digital storefront without the possibility of competition, so digital pricing on console storefronts is artificially high.
Plus, they’ve already shut down stores on older consoles and people have lost games. That’s less likely as console companies learn how to make competent digital storefronts and account systems, many have felt the burn of losing all your digital purchases on console and won’t let it happen twice.
I ended up with a disc console, but I admit it makes up a minority of my usage. I just wanted to be able to play old PS4 games, and blu-ray movies. Most of the games I play are on PS+ or purchased digitally.
I must be in the minority that prefers digital and went digital for good since the 7th generation, SCII HD bought on the X360 still plays on XSX. I only buy physical when it is an import not available in the store in my country such as DOAX3, thank you Play Asia. I have a diskless XBox and Playstation, so I play the imported games on the Switch. If I didn't have a Switch and if the Playstation versions weren't more censored I might see a reason to get a disk drive for it.