User blog comment:Suparockr/List of Plotholes throughout the series/@comment-5503561-20120718012533/@comment-5131329-20120718034051

in-universe reason? uh...they flew into an improbable astroid field and somehow all came out looking identical? In real-life, EA likely told BioWare to make ME3 on the cheap, so, we get Attack of the (Sovereign)Clones.