IMO, that is too high for storage and definitely for comfortable smoking.
The old standard was 70/70 but I think most have decided that's too high. Non-Cubans do better with higher RH than Habanos in my experience, but I am talking like 66-68 on the high end. I use Heartfelt beads in my coolet and Boveda packs in a couple tupperdors. I use 65 for everything which I find to be a good compromise RH. Are your sticks burning well at 73? In addition to mold and bugs, I found my cigars really tended to burn poorly and unevenly at higher RH numbers.
As Hoosier suggested, give a lower RH a try. I bet you prefer it. If not, you can always go back.