They don't always go this wrong, but many do. At a minimum, once the engine jumps time, you are going to have bent or broken valves and the associated damage. We have caught engines in the early stages, when there is just the debris from the IMS alone, and for the most part, they could not be saved either due to the potential for the girt damage.
That said, you need to step back and recognize that it can be avoided, and the potential downsides for cheaping out on trying to prevent it.