I haven't seen a single second of the show yet as I'm waiting to binge watch it once all episodes are available.
A few thoughts about the title, as it's been mentioned a couple of times:
1. It's the title of the main book that the series is based on, so it's not that they made it up for the series.
2. The 8th Air Force and Bomber Command both had a huge impact on the war and both took an absolute pasting in terms of casualties and I don't think the title is really intended to put one on a pedestal over the other.
3. The bombing effort, especially from mid 1943 (Pointblank directive) onwards, was absolutely instrumental in decimating the Luftwaffe and achieving complete allied air supremacy over
Western Europe by the time of the Normandy landings. The 8th Air Force was particularly important in this as, apart trying to precision bomb ball bearing factories etc. instead of a area bombing like the Brits, they flew in the daytime with fighter escort and acted as bait for the Luftwaffe fighters to be picked off, to the point of extermination, by the P-51 Mustang escorts. From 1944 onwards they could basically bomb anywhere in the Reich with almost no opposition except for the remaining anti aircraft batteries. So the guys up there in B-17s in 1942 probably didn't feel like masters of the air at all whilst they were getting smashed by flak and enemy fighters, thinking they were not going to make it back alive, but by the end of the war, I'm sure they absolutely did feel like masters of the air and it was largely their efforts prior to that which were key to making that happen.