It's not really relevant for the topic. The 151,600 pounds limit could be because of derate. Or maybe they took off with full thrust. I am not familiar with LGA, Airbus or it's performance.
Fact is: 1000s of reduced thrust takeoffs are being made every day where a dual flame out due to bird strike is a (minuscule) potential risk. However, it is not a risk that legally needs to be accounted for.
So again, what are you trying to say? That reduced thrust takeoffs are unsafe because they reduce your margin?