I haven’t seen Clint Eastwood’s American Sniper, and I hold no animus toward the director (though I don’t particularly like what little I know about his politics).
That being said, why anyone would use an artificial baby when it was probably as easy–if not easier–to use a real one is literally beyond comprehension.
As anyone who’s read this blog is aware, I am a HUGE fan of practical effects, though with a caveat: If there’s an existing thing that you are trying to put in your movie, it seems logical to me that you’d use it, if at all possible. We don’t have dinosaurs, so though practical and CGI effects we bring them to life, so to speak.
This makes sense, though the last time I checked, there are plenty of babies, so why wouldn’t an actually child be used?
I have no idea, but as you can tell from the video, the result is hilariously bad. Now, perhaps within context of the movie the baby doppelgänger perhaps better fit, but judging from the Youtube clip I posted above, I am not seeing it.