Yes, while it's low-valued it's not much of a deterrent to big players which is a disadvantage (depending on how often small players realistically can afford to challenge the big players legally under current system).

But by defensive usage I mean then at least you know someone else isn't going to patent your key stuff. And once you've got funding/get acquired, the patent could be declared as higher value (and additional fees paid/validation done), and then future litigation to anyone who infringed after that date could be for higher amount.