Unfortunately yes.
However, a ZFS system with CoW (copy-on-write) should lower the risk quite significantly - and perhaps that is why only 1 one with 1 sat is experiencing this issue. Imagine how the situation for @bryanpendleton would be if this was EXT4 partitions with Hashstore 
It has been raised as a concern many times, and extensively discussed in the hashstore main thread here [Tech Preview] Hashstore backend for storage nodes
Most recommendations so far goes in the direction that a UPS is a very smart addition to your setup, in case you opt in for hashstore.
It has also been discussed, that a repair / rebuild tool perhaps would see the light of day in the future (this is not yet announced by StorJ)