Middle of my arse!
It's costp cutting greed
Digital copies cost Sony so much less and they are using this 'fairness' angle to remove the cost of printing and shipping discs at all.
Am sure that those with the digital only PS5 would be happy to give away or sell on the disc in the collectors edition set too. I can't see any digital owner, complain about having a disc included in a physical DISC CASE (the steelbook)
I have so many steelbooks, with discs still in, that I don't need as I've either gotten a digital version down the line(gtav on ps3, shadow of mordor/war etc), or, as I only used it for playing Destiny with my xbox friends(am a PS gamer), pre-discord being on console, I have the Xbox disc for Destiny 2 vanilla, inside the steelbook, and only an XB Series S, so no means to play the disc at all. It makes more sense than and empty steel book, completes the package having it in there, makes sense.
OR, brain flash... have the customer choose theappropriate copy of the game they wanted in the set and maybe discount a fiver for the digital option over the disc?
Its so bloody stupid as steelbooks are FOR discs. They are the thing that houses disc....
If I can't get an empty steel for under a tenner, or buy the physical disc with the steelbook I guess am not getting anything.
This, unfortunately lovely looking set, is 100% not for me unless they change their mind and throw in the disc.
EDIT;
(Excuse the waffle or if am not making sense, migraine...May re:edit when my brains less hazy...but I think it makes sense; sony = gree and keep the disc copies in the steelbook )