Two things..
Firstly the comment about never trying to fly under a flock of water fowl because their natural instinct is to dive away, is spot on.
Secondly, I’ve flown that departure out of LGA numerous times and in my personal opinion, when you consider where he hit the birds, there was simply nowhere else to put the aircraft given the loss of power. JFK, EWR and TEB or even turning back to LGA were all out of the question. It was the only long and flat space in one of the most densely packed cities in NA.
At the end of the day, he made a decision and everyone walked away. Learn what you can from it and hope you’re never in the same situation.