[imtringued]

>Exactly, which means the system is resilient, which means it's more forgiving of random mutations introduced by gene editing, which is perhaps why most scientists are less concerned than you think they ought to be.

The argument should go the other way. Because these DNA mistakes are predictable our genes have designed safeguards against them. If you now randomly introduce a "mistake" that is beyond the capability of the system then it won't help you.