A bird strike (keep in mind birds fly in flocks) I'm guessing would either take out 1 engine (which is fine on a new 2 engine plane even during takeoff) so no b

A bird strike (keep in mind birds fly in flocks) I'm guessing would either take out 1 engine (which is fine on a new 2 engine plane even during takeoff) so no benefit or take out all engines (or all engines on one side which again means just 1 engine on a 2 engine plane). A flock big enough to take out both engines on a 2 engine would be big enough I presume to take out all 4 on a 4 engine. Four engines just means there's 4 things that can catastrophically fail and potentially damage the plane rather than 2.