I have sleep apnea and have had several procedures in order to improve breathing. Of all of them, correcting a deviated septum was one of the easiest.
I had a deviated septum for many years. I could breath out of one nostril (right) but not out of the left unless I closed the right one and my mouth and forcefully drove air out of the left one. I learned to live with that for a long time, but never liked it. It was somewhat uncomfortable and I knew I wasn’t breathing at my full capacity - sleeping, sport or otherwise. One day during a visit with my ENT, we discussed doing it. A week later, I had the outpatient procedure. Easy with a quick recovery. Ever since (about 10 years now) I have breathed easily through both nostrils. Not surprisingly, I wondered why I waited so long to have it done.