Why close the whole forest now?
All available manpower has been shifted to fire suppression and fire suppression support.
It is easy to think that once the fire is out, the work is over, but that is very far from the truth. There is a HUGE amount of rehabilitation to be done. There is a looming disaster when the rains come, which may be prevented to some degree, by preventive measures, now and in the next 6 months. To open some of these trails, thousands of trees will have be cut and moved. Same for roads.
Who is going to do the work?
Is it bad to lose a home from a fire, but ok by a mudslide created by that fire 6 months later?
All available personnel are going to be shifted from other areas of the forest, and probably temporarily assigned from other forests, to try to mitigate the potential mudslide disasters that are the possible next event in all this.