There's merit in the argument that she, and many others like her, would not have had any real choice. Political repression in Germany from the mid thirties had been such that people that disagreed with the government had either left, were sent to concentration camps or were dead, so if you knew what was good for you you kept your head down and did as you were told.
Sophia Scholl is an exception, but it takes an exceptional character to do what she did, and I myself don't think I would be that brave.