So, nobody's ever known of an instance where a woman has deliberately lied about her "fertility status" & gotten pregnant in order to "trap" a man, either personally or financially?
To use the fender bender analogy, what if somebody deliberately involved you in an accident just to collect on your insurance? Would you then feel an obligation? If the driver was giving every indication that he was about to turn right and then at the very last second accelerated into a left turn, how is that in any way your fault, other than that you were on the road? Are you expected to base every single driving decision on the assumption that every driver is going to do the exact opposite of waht they signal?
Apples and oranges, perhaps, but only to a point. This particular guy might not be a good example, and of course a child is a lot more important than a car, but I'm not about to say that the laws don't need some, shall we say, "refining" when it comes to cases such as this.