Miers is far from an everyday lawyer. She was President of the Texas bar and White House Counsel for 5 years.
It doesn't matter who the client is. An everyday lawyer works for a client and handles his everyday legal issues. Miers is such a lawyer. She works in a realm that deals with nuts-and-bolts issues, not with expounding on the Lemon Text, the penumbra of an emanation, or arguing the originalist vs. revisionist theories of constitutional law.
She is out of her element.