Ok, but why is this even a point worth making? The "difficulty" you refer to is there precisely because being a law-abiding gun owner who would still use their gun to defend against tyranny is not the same as being a criminal who uses a gun to shoot innocent people. Since they're not the same, calling it a "difficulty" that you can't take away the law-abiding citizens' guns in order to keep criminals from getting them makes no sense.
If your intent was only to take away guns from the criminals, not the law-abiding citizens, then the "difficulty" is not that the law abiding citizens view gun ownership as part and parcel of freedom. The difficulty is that of judging who is a law-abiding citizen and who is a criminal in advance, before any gun is used for anything. But, as others have posted elsewhere in this thread, the law-abiding citizens who own guns are overwhelmingly in favor of requiring people to show some evidence of being responsible law-abiding citizens before they can buy a gun, just as we require people to show evidence of being responsible drivers before we let them drive cars on public roads.