[zobzu]

anyone can make a license that is both open source and providing warranty btw.

open source licenses generally don't provide warranty because they don't have to and devs, providing free stuff, certainly do not want to bother with warranties. Companies could.

[DominikR]

Sure, they could. But it would be insane. (at least at the current prices)

Just compare how much an insurance costs that covers damages caused by yourself (being negligent) as opposed to those covering only damages caused by hardware/software defects.