I don't think that anyone can sanely argue that a system with a failure mode that requires auto-eject is some great advance in flight safety.
Also, I can't think of many forms of combat (or other impact) damage that would go from undetectable to immediate departure with a routine mode switch. For instance, if the gear decides not to come down, you have time to cope with it.
This was raised as an issue with the pre-1995 alternative to the shaft-driven fan, Mac/GE's gas driven fan. How would you know that your gas ducting had been punctured until compressor-exit-temperature gas started blowing into the airframe?