Comment by Polizeiposaune

Smart bomb targeting is more of a subset of the tech required for precision landing.

Smart bombs just need to get to the target coordinates. A reusable rocket needs to get there with zero velocity, while pointed straight up, with minimal pitch/yaw/roll.

Pretty much all of the barge landing failures shown in "How Not to land an Orbital Rocket Booster" would have been accurate enough to put a warhead on target.