@SecurityWriter FWIW, If I understand correctly fail fast is exactly how they got the Dragon architecture operational, and that is now crew rated and a regular service carrier for the ISS. But I think the key difference is that they were using fail fast for the experimental recovery process and not the launch and orbit attainment process. Because those are solved problems and they couldn't afford to be losing other people's stuff when there were reliable alternatives out there.
There are no reliable alternatives for a single stage to orbit mega craft. I don't know that there's any potential way to do it other than trying to do it.