First off HB89, has nothing to do with allowing more guns on the street. It actually just expands the locations in which GFL holders can carry.
Meaning if you have a GFL you can carry: at locations that sell alcohol for consumption on the premises (aka bars and restaurants) as long as the person isn't consuming alcohol, state parks (ie. Grant Park, Centennial Park), and Public Transportation (ie. MARTA). Which under current law GFL holders cannot.
This would help protect the people that are legally able to have guns in their possession from being victims in open areas.
How would you feel if you and your family are at the park and a guy comes up and tries to attack you, knowing that you can't carry your gun, but you have a GFL?
I'd feel better knowing that wherever I go I can carry my gun and not feel "naked" without protection against some ol' schmo that wants my money or tries to hurt my family.
By allowing this law to go in affect people like this woman who was attacked in the park would not have happened because she had a GFL and could have protected herself.