The chopsticks actually don't catch the booster by the grid fins, there are little struts that stick out from the rocket that don't stick out nearly as far.
I thought the same thing before the first catch, if you go look at the catch footage you can see the booster resting those on the chopsticks.
I thought the same thing before the first catch, if you go look at the catch footage you can see the booster resting those on the chopsticks.