The balance of strength and mobility across the muscles and joints of your body is what is really required when you think about the importance of posture.
Once you experience the immediate, noticeable difference Airbench makes in the way your low back feels and functions, you are going to want to keep doing it even when you are not in pain.
Headaches from lifting can adversely affect your functionality and ability to train for several days, if you’re lucky, and possibly weeks, if you’re not.