Sorry to hear about your problems. I also have all of the conditions you mentioned (or so say the doctors). The hernia/gerd causes the asthma. In theory. I find that it's hard to tell what is causing what. These things tend to go together and the symptoms blend.
What type (if any) breathing problems are you experiencing? Mine were almost constant.
You are right, there are worse things than hiatal hernias and GERD. Our lives are made miserable by GERD so it is worthwhile to try and lessen the symptoms in any way we can.
Good luck in your treatment,