I've had it happen, and I also lost data on my MacBook. Apparently a disk was faulty. They say that can happen to anyone, but it never happened to me with non-Apple hardware.
Apple uses the same drives as other manufacturers, so yes it can happen to anyone.
I cannot stress this enough: Backup your data. Even if you have RAID, you can still accidentally delete data. Considering how simple it is to use Time Machine, there's no excuse for not having backups.