The importance is clearly recognized by the Designers in applying triple redundancy.
IMHO is unacceptable the FACT they are "failing" almost SIMUTANEOUSLY.
Redundancy is not the solution to elements that "fail together"
IMO this configures a SERIOUS and PERSISTENT "DESIGN FLAW" or even, ERROR
I do not agree
Redundancy is more than duplicating a single system (even though there are multiple similar components). It also considers multiple systems which can take over and mitigate the failure condition and still provide safe flight and landing.