They would not have known the true extent of the damage until they went in and looked at it. All the other tools can give you a good idea but until you go in and look you don't know for sure.
A biopsy to look at a cancer cell or a blood test to look at a cancer cell is the only positive way to diagnose cancer. My father died of lung cancer, they were sure he had it but they never knew for sure until the autopsy.
Yes, indeed, but the point is that MS still could have been smothered prior to going over the stairs. One doesn't necessarily negate the other.
IMO