Girraween is a special place to climb, and be away from the masses. The main reason for the carrot bolting is so that it is tolerated by the national parks. Less of an eyesore for the hikers and walkers who predominately use the park.
If you can't lead using bolt plates then you might want to climb elsewhere. The routes there are only run out if you can't climb at that grade. Don't go there to project harder routes than what you can climb.
It is an amazing place with beautiful climbing. It is nice when you can go climbing somewhere and actually grade the climbing on the quality of the climb and not on the grade and how well bolted it is.