people who use streaming

out of the literal hundreds of discs i've seen from my own home(s), friends, family, and thrift stores, i have not oncw, not ever seen real disc rot with my own eyes. i wouldn't know about it if the internet wasn't a thing. it's so weird to use disc rot as a argument against optical. might as well use getting struck by lightning as a excuse to never go outside. what conditions need to be met for this kind of rot to occur?