I don't think you've provided enough information to know for sure what her response really means.
Most people, particularly intelligent people, are not extremely confident in their principles... they constitute a working hypothesis more than a firm foundation of belief. In a sense it's deeply arrogant to claim that any belief is anything other than a working hypothesis... and so I'd argue that the most important thing when considering a person's principles is the notion of what about the world has led them to act passionately toward a goal?,... since anything that is actionable has likely passed a fair bit of scrutiny on the part of the belief holder.
On one hand, she may have very deeply held principles but may not have felt like opening up to you about them just then.
On the other hand, she may disagree with your principles and wishes to avoid an inevitable realization of conflict.
Or she may be more the wishy washy type and not really have any principles, but may realize that she probably should.
I think your opening with "who doesn't at least have the honesty and moral courage" may have made her reluctant to open up, since it suggests that you're ready to judge whatever comes out of her mouth.
If you really care about this person, I suggest you apologize for being brash and tell her that you're very curious about the big picture philosophies that guide her life, and that you address them more narrowly in a future conversation... such as:
What do you think is most important about how a person lives his/her day to day life?
What is most important about how businesses conduct themselves?
How do you feel about the Earth and humanity's role as stewards of the environment?
Worst case, you realize she's a bit shallow. Best case, you open the treasure trove of the deepest innermost thoughts of someone you respect.