I can think of one worse place. In a bomber over Europe in WWII. More losses that the Navy and USMC combined.
Yes, it’s terrifying because you’re completely out of control. Nothing you can do but ride along and hope you aren’t hit, because you can’t dive for cover or affect your odds of survival in any way. But somehow, being stuck in a metal compartment where you can be sealed off, burned alive by flame or steam, drowned, be eaten by sharks, adrift for days, exposed to the elements, trying to swim through oil and fuel that may be on fire, being sucked under with the ship, surrounded by dudes and thousands of miles from ladies... if one level of hell is worse than another, I would rather be in the air.
One other worse place-a merchant ship carrying ammuntion to England or Russia. Except for the marines, merchant marines suffered the highest % casulties. Finally in 1988 those merchant mariners who served on ships during WWII were given veterans status.
I don't know the stats, but I doubt your assertion. As horrific as our Army Air Corp losses, I would think the Naval battles of the Pacific and especially the island-hopping by the Marines was worse. Of course then there was Normandy and the push through Europe by the Army. I'd be interested to see the total casualties in each theater.