Not it didn't. What was extreme about AF447 (and possibly Air Asia) being flown in conditions which it had been certified to fly in, that is icing Conditions? In that case, the fact is the crew and aircraft were entited to be there.
That's a bit of a dodgy statement for me. Certified ="Entitled"? When you certify the plane you just do/simulate a test under certain specific and frequently limited conditions prescribed by the Airworthiness authority. Those tests don't cover all conditions. That's why they say things like Max demonstrated crosswind = n kt.
There was a 737 years ago with CFM 56s that ingested a bunch of water and hail in a heavy storm over the gulf. They burned out both engines and miraculously landed on a levee in New Orleans with no power. Cerification didn't test for that much hail and water.
Our own fleet of CFM 56s with a unique but certified set of Fan blades has it's own set of problems related to moisture that sure wasn't tested for during certification. We have some mitigations in place to deal with it but quite honestly the phenomenon is still being studied to be understood. They still don't have a solution.
The effects of supercooled droplets was only really understood less than 5 yrs ago.
And how many would ever have thought pushing the nose down would trigger the stall warning?
etc.
Never let your guard down. There are always new things coming up that were not part of the certification process.