Holy shit you are dumb. Things like Laser Discs and CD-Rs are already getting disc rot. Optical discs tend to fail a lot faster than magnetic tape, due to disc rot.

https://en.wikipedia.org/wiki/Disc_rot

You have adhesive problems, UV problems, oxidation problems, etc. The disc starts to eat itself in some way. Magnetic tape doesb't have this issue. It's simply polyester film with iron oxide coated on with a binding agent that should still be going strong today if its a low end, standard, name brand tape. Just look at cassettes; the vast majority of NOS and even used blank tapes are in perfect playing condition with no problems when you record.

You also have engineers like Steve Albini who only use tape because it exists in the physical world and can't disappear from a hard drive failure, corrupted file, etc, and those problems persist with any flash media or HDD, and optical media will fail very quickly if its blank media you record onto.

Reel to reel tape should last a human lifetime, if not longer, if kept under halfway decent conditions. There are all sorts of random reel to reel tape from the 50s and 60s that you can record onto and have no issue.

So Albini leaves all his recordings in a humidity/climate controlled room and can then grab master tapes for bands whenever they need them. There have been instances where a band recorded with him in the 80s and never had success. They broke up and retired, but were discovered online in the 00s and gained a cult following, who wanted a proper mix of their album instead of a random bootleg someone uploaded. If Albini used a different form of media, ex: a CD from the late 80s, they might not have been so lucky.