... and I cannot imagine anyone carrying with the hammer cocked.
And even if you were to carry a revolver with the hammer cocked, it wouldn't make much sense to have an empty chamber behind the barrel, would it?

... and I cannot imagine anyone carrying with the hammer cocked.
Pocket carry, and I sometimes do it, has limited applications. From a seated position, unless it is a cargo pocket, you will not have access to the handgun. From a standing position, it is slower to draw than from a IWB or OWB holster...
When you carry a gun you should envision various scenarios of how you might need it. If you only envision having plenty of distance and time to pull it and rack the slide, then carry it with an empty chamber. But I'm not sure you will always have both distance and time or even one of them. Most attacks will be fast and close and needing both hands could be a recipe for disaster.
But* pocket carry does convey one significant advantage that no other carry method can match: you can actually have the gun in-hand without anyone being the wiser.
Properly, you would store your emergency $100 bill rolled up in the empty chamber. Just sayin'...Perfectly normal if you're packing a Colt Peacemaker Single-Action Army.