Guns are tools. A J frame isn't a pocket gun. It serves a different purpose than a Rohrbaugh.
If in 1980 you told me that I would become a pocketgun fan, I would have told you that you were smoking too much juju weed. Then one day, in a gun store, looking at the used gun trade-ins, I saw a Seecamp 25. It was love at first sight.
What the pocketgun allowed me to do, was to be armed when I wouldn't be otherwise. I carried that 25 in a Galco wallet holster for years, and in the process went from a Seecamp 25 to a Seecamp 32. Then to a Guardian 380 and 32 and now to a Rohrbaugh, with a side trip with a Kel Tec 380.
For some reason, people like to take compact firearms and try to claim that they are pocket guns. You want a test: here is one. Go into a gun store wearing jeans. Take a gun and put it into your rear pocket. If it can be totally concealed in your rear pocket, then you have found a pocketgun. If a little of it peeks out, then you have a small gun, but not a pocketgun.
Don't lie to yourself. A pocketgun isn't a substitute for a primary defensive firearm. What a pocketgun is is a BUG, an always gun. That little insurance policy that no one should know about except for you.
You like the J frame--buy it. But also consider a pocketgun as a BUG and as a gun that you can carry when you otherwise couldn't.
Think of it this way--a J frame is like a small travel clock. A Rohrbaugh is a watch. You could carry the travel clock in your pocket instead of a watch--but do you really want to do so? No. Likewise, when on a trip, do you want to rely on your watch instead of a travel clock? So you get both, knowing that each has its purpose, and in a pinch each can cover for the other.