Well, each RAID implementation has different designs and goals in mind, but the original design was simply meant to replace expensive single drives. Using more

Well, each RAID implementation has different designs and goals in mind, but the original design was simply meant to replace expensive single drives. Using more spindles you could get more performance out of a bunch of cheap disks, and to help with the fact that these cheap disks failed more often, you made them redundant. In general, dealing with data corruption that does not generate an error is not within the purview of RAID implementations. ZFS and btrfs handle it because they're more than just RAID implementations. mdadm can do similar things in a RAID setup if dm-integrity is used on all of the drives (but it is not used by default when just setting up mdadm/lvm/etc.)