Physical games aren't the whole game, is the main thesis. A DRM-locked physical copy that needs DRM-locked downloads to be complete is equal in preservation weight to a DRM-locked fully digital game. Once both releases are DRM-locked and download-reliant, I do consider the DRM-locked download that's still acquirable 10 years later to be better than the one that isn't.
Meanwhile outside of console land, DRM-*free* digital exists. That's the holy grail gold standard, not 60% of pokemon sword on a flash drive. DRM-free digital survives the CDN end-of-lifing. It survives my PC exploding, because unlike even *complete* physical games like a SNES cart, I can copy my DRM-free digital installer to as many devices as I want. DRM-free digital installs the version of the game I downloaded, without any connection to the internet. DRM-free digital survives the music license for a David Bowie track expiring.
Consoles will never give us DRM-free digital, because the only reason consoles exist now is to be DRM. So the only relevant preservation of console games is dumping and cracking and emulating, because that *makes* them DRM-free digital, even though they're not legally such.