I believe there is more to animal behavior than we know. I am aware that most people believe that birds flying around together usually do this for protection. But I read another point of view that I really like and seemed to ring true. The author (I can't remember who) said that this is also a form of creative expression, like art. Now when I see a flock of birds flitting around in unison I look at it now as an art form.
Next time you see a mass of birds in flight, consider it as a form of creative expression. I doubt you will continue to see it just as a means of protection when you consider it differently.