Mav, I agree with what you are saying, but think of it this way:
All of your possessions, EVERYTHING you own, is in that house. You leave. The house gets significant damage. You are not able to get back to it before someone pilfers anything left of value.
It isn't as easy as you think to simply "up and leave"...especially when the hurricane is a Cat 2 and there is a great likihood that the damage isn't going to be that bad.
If it was 4 or 5 then I'd think about leaving. A 2? No way.