My understanding is that crispr is less like a scalpel and more like a chainsaw. Great care just be taken to avoid introducing cancer causing mutations.
I wouldn't characterize it like that. It makes mistakes. It's a scalpel in shaky hands. When it works correctly it is very precise but just not 100% reliably.
in vitro there are various techniques where you use crispr on a cell line and then purify it by killing off the cells with errors and only then implant them
in vivo... well there are errors and among other effects are potential cancer
in vitro there are various techniques where you use crispr on a cell line and then purify it by killing off the cells with errors and only then implant them
in vivo... well there are errors and among other effects are potential cancer