Hi Janos,
I recently had stage 2 and interpreted that question in the same way. I also answered that I didn't mind changing my plans and got through to stage 3. If you are planning to write to NATS' HR then I'd have a few more examples available before submitting the letter, especially as the policy is not to give any feedback. I know how disappointing it is, especially when you were successful at the other components of stage 2. Best of luck!