I’ve seen a few headset removal tools that say they would remove a PF bb, and whilst allowing you to knock either the bearings out the cup, or the cups out the frame (depending on which the tool is pressed into), what it won’t do is ensure that the tool is exactly centred when you strike it to tap it out. Which is what the Park Tool one does.
So I guess my tip is exactly that – make sure you hit the tool when it is exactly perpendicular to the frame and BB, otherwise you may risk damaging your frame. I’ve had to really hammer the bollocks out of a couple of PF BBs to get them out.
No doubt someone will say you’d need super-human force to bend a bb shell, but if park tool have designed a tool that ensures a direct hit, it seems commonsense to follow that approach to prevent damage. However a direct hit is the path of least resistance, so it could be for that reason.