My microwave and car don't stop working if I accidentally scratch them. My DVDs do. My microwave is more or less disposable. I have DVDs that cost more then my microwave did new. My car if it breaks down can be repaired with replacement parts to restore it to it's previous state. Scratch repair is hit or miss on DVDs depending on how bad it is. If I want to use my microwave or car, I have to actually physically go to them, physically put something in them, and turn on (or start) them in order to make use of them. With ripping my DVDs, I have the option of not doing that and just turning on my entertainment center and selecting the movie from a list of them sitting on my computer. Yeah I'm lazy. But that is why god invented remote controls anyways. My kids can reach my XBox to play the movies and know how to start them. They can't reach all the drawers where I keep my DVDs in their cases and I'd really prefer them not to have to get them out. They are probably one of the bigger sources of scratches on some of the kid discs.