In the movie Contact the Earth wasn't under a genocidal attack by a overwhelming forces of a highly advanced alien race, they just received some blueprints that

In the movie Contact the Earth wasn't under a genocidal attack by a overwhelming forces of a highly advanced alien race, they just received some blueprints that they thought should do something. And It was at least known how to activate the thing. With Crucible, they didn't even know until the very end. Very different case, I'd say.