One does not have to admit intent, intent simply must be proven to a jury regardless of what a defendant says or does not say.
However, Hillary isn’t capable of intent, intent is impossible to prove when Hillary is involved, in fact, intent literally does not exist within her, and jury trials do not apply to Hillary Clinton.
That's the difference between the law and the real world. The law does not apply when it's Hillary.
Is intent necessary? Well that depends entirely on what the meaning of "is" is.