The thing with creating clones of extinct species (which is not what they did) is that those species went extinct for reasons.

If we cut down all the forests and the birds who depend on the trees die off as a result, and then create clones of those birds, they'll just die off again unless we put the forests back, which we are not doing.

If all the bugs die because the earth is now too hot for them to survive, and we create clones of them, the clones will all just die again.

This is a gimmick but ultimately it's "feeding cats to the coyotes."