Perhaps a different word, then. Strictly speaking, it is not a WARN, anyway, it is a STATUS. A CUE.
The computer is sampling three sensors continuously, and when they are out of limits, the computer fails different combinations.
Giving the pilots a heads up that the computer senses trouble is not a WARNING.
As I say, it is a STATUS/REPORT.
At some point, 447 lived and died with the duff AIRDATA. The Pilots did not know until 17 seconds after the autopilot quit, whilst the a/c was maneuvering.
What would have happened if the computer had flashed SPEEDS/FAULT? Forget this crew, what of the next one?
The condition was ill addressed at the time. There are no excuses three years on.