If we're being fair and honest, then technically, she's right. Even Scalia said in 2010 that the equal protection clause of the 14th amendment didn't apply to women. Back when the antislavery amendments were written, it was custom that women weren't equal to men, couldn't be landowners, or do or own most things that we commonly accept women doing or owning today, so the former slaves that the amendments referred to were all men.
However, if today's women can own land, work in any job, serve in the military, serve in Congress, sit on the bench from the local courts all the way up to the Supreme Court, and run for the office of the President of the USA, then an equal rights amendment is a formality.