Automation DOES add to flight safety, up to the limits of what's it capable of doing.
The danger in is learning to rely on it to the extent that you forget all of your other airmanship skills. Every system on board the aircraft designed to help the pilot has it's strengths and weaknesses. Good airmanship requires a good understanding of those properties, and retaining the skills necessary to safely fly the airplane when those systems are not available. Any other approach to flying is foolish.