Could we specialize in terraformation? It would be nice.
Unfortunately, focused or not, terraforming is not realistic. Look at Mars. The problem is not creating an atmosphere. The problem is keeping it and protecting people there from dangerous rays from the sun. You see, Mars has no organized magnetic North or South. Without a magnetic field the people there would die of exposure. Furthermore, without sufficient gravity to hold in the atmosphere, it would blow away by rays from the sun. Mars simply cannot be terraformed. It doesn’t matter whether you focus or not.