Because an apology is where one stands down and admits one's failings. Defending one's position is half of an argument, which is an entirely different thing.
Her 'apology' is nothing of the sort - it's a passive-aggressive way of saying "I'm sorry you feel that way" that implies "(but you're wrong and I'm right)" .
I'm right, you're wrong - and oh yes, the:
"silent majority"
are also on my side.