Certification doesn't give guarantees, rather the process attests demonstrated compliance with a defined set of Standards.
That the very great majority of flights routinely go from A to B indicates that the Standards generally get it right - most of the time.
It follows that unusual circumstances sufficiently outside the certification and training envelopes may present ANY aircraft/crew with a situation which is beyond a reasonable probability of recovery.
Given that there will probably be some folk reading here who have lost family members in the AF mishap, it probably isn't helpful to pursue this line of discussion at the moment ?