Then they kinda failed, since you're never really threatened by anything to make you paranoid of synths. Lotta talk about how anyone could be one and betray you; but it never really happens in a way that would really get the player paranoid. They even have a list of actual synth plants throughout the commonwealth inside a terminal at the Institute which you get access to fairly early on, removing almost every possible mystery about it.
The Thing did a much better job of inducing paranoia that your allies may actually be the monster.
If telling not showing things in a movie is a cardinal sin of writing, then it should be considered doubly awful for a video game to tell you, not show you, and not even let you act it out.