I read somewhere there is a WAIT LIST of Rockettes to perform...
The Madison Square Garden organization that runs (apparently) Radio City Music Hall and the Rockettes said it was NOT mandatory, was fully voluntary, and had more Rockettes sign up than they have room for.
This woman is clearly not thinking. Her career as a Rockette is limited and, like Trump or not, this will probably be her only opportunity to perform in a presidential Inaugural event. Others obviously understand that honor.