What is she supposed to say? Perhaps "our products have bad software, don't buy them, go buy Nvidia instead"?
Companies really only admit to failure if there's no other option and the pressure is too high ("Antenna gate" and others come to mind).
From: https://freakonomics.com/podcast/hoopers-hoopers-hoopers/
The investors already know AMD's SW is bad. Now they know not to trust AMD's CEO.