It sounds like a scheme. But the big question isn’t how cells protect themselves by very complex mechanisms but why? Boulders don’t seek to avoid becoming sand. Something is different about life that mechanical explanations do not address.
Well, first, we don’t really know for sure that no other life form does this. Maybe others do and we haven’t caught up to them yet. It would be easier to place in a context if we had a group to study rather than an outlier.