The danger of Yes men/women

I recently witnessed a new CEO have a meltdown because two of her key people disagreed with something she was doing.  They asked for a private meeting with her - wanting to discuss their concerns - and she not only denied them the meeting, but she fired them.

This woman could only keep up a relationship with those who thought she walked on water - and kissed up to her.  Sycophants  are not really useful in the long run.