If they are shit at communicating it will affect share prices which could end a company. They have to say the right things at the right times or they could potentially break laws by saying the wrong things.

I notice, very glaringly, you didn't mention a SINGLE thing about the company running efficiently, being profitable, producing something of value...

It's not that the company could end if it doesn't do well at what it does. It's that the company could end if fickle, short-term focused asshats aren't happy, and to keep them happy, you need a head fickle, short-term focused asshat at the helm.

God, I wish every company could just be private.