At age 55 I had severe sleep apnea and had not had a dream in years and sometimes woke up at night, gasping for breath. if you aren’t sleeping deeply, you don’t dream. Immediately upon getting on the machine, my dreams came back. I have a very small mouth and airway and then I allowed myself to gain 50 pounds and that was the problem.
Five years ago, I got serious about my weight and lost the 50 pounds. My sleep apnea went away. However, the pulmonologist warned if I gained weight, it would come back, especially given that I have a small airway. I am so happy to no longer need to wear the CPAP machine.
However, when I needed it, it made all the difference in my life. I believe that person you talked to at the doctors office was wrong and that they will pay for the study whether you want a CPAP machine or not if you even need it.