Confronting a stadium audience you can't see the whites of their eyes. It's just an amorphous mass of noise and of course you can't see the alleged billions watching at home either so the degree to which you are intimidated is quite low.
What is sad for women of my generation is that they weren't supposed to work if they had families. What were they going to do when the children are grown - watch the raindrops coming down the window pane?