Yes, but chances of getting useful data out of the helicopter are much greater if you test the thing before subjecting it to harsh conditions.
For example: if you know that lift-off works, then that's a huge datapoint.
For example: if you know that lift-off works, then that's a huge datapoint.
I don't know the actual list, but it's not hard to guess why they couldn't do everything, including ejecting it from the main rover and getting the main rover out of the way, in the ~12-14 hours a day that they have to do stuff.