Why would it be considered "jumping into a hasty situation" by signing a GM early when that someone is the best candidate?
Because they/he may not be considered the best candidate... didn't think it was that difficult to read or understand.
In a business, you make it a point to interview all candidates before making a decision. The "Leave no stone un-turned" quote is a perfect example.
Imagine if the Panthers would have taken that quote into fruition last year and when out of the way to interview Harbaugh, the Panthers probably wouldn't be in this position to begin with if they had.