If only it were that simple. A physical DVD simply reduces the download time. It typically still copies onto the console HD (the DVD being used as an annoying proof of ownership.), and still depends on online services.
Does it? I had an 80+ GB practically-day-one-download waiting when I bought Forza Horizon 5 for my XBox. The disc might as well have been a blank.
Which is why I said typically. It's still an annoying dongle though.
DVDs can hold up to 8.5GB of DRM client software.
PS5 uses BDXL discs which support 100GB each. Xbox allegedly does too. Games have also shipped on multiple discs for a long time.
Sorry, 100GB of DRM client, then...
Per disc. As I said in my comment games also often ship with multiple discs.
Sorry, I'm being a bit cynical here -- I'm suggesting that the DVDs contain nothing but extremely bloated crapware to download and decode the game that should rightfully be yours. Of course, I've got some morbid curiosity about what's actually on those disks, but not enough to actually look. My deepest condolences.
RDR2 came on 2 disks and still had a massive day one download.