But this isn't a new area for legislation
"... there is a sea of criticism for any of us who try and legislate in new areas ..."
I remember people patiently explaining to politicians why this was a stupid idea in 1993, so it is hardly new. The idea has come up again and again since then and I am sure there are grey beards among us who remember pointing out the same issues to Julius Caesar and Gilgamesh.
"I don't need to understand how encryption works to understand how it's helping – end-to-end encryption – the criminals."
Perhaps the NSA are a bunch of criminals, but I am not convinced that is what really she meant. After spouting this non-sense months ago, she has had plenty of time to listen and understand. As she has just stated she has not learned anything (and didn't even try) all we can do for now provide sarcasm and ridicule with the faint hope that she will be replaced by someone less wilfully clueless.