By confining defense to the "home", everywhere else is open to criminal exploitation, something I doubt the founders would have agreed with.
Suppose someone said you could only use your cell phone in your home? Would leftists agree? It's a communication tool- something people might want wherever it's needed. Guns are defensive tools. They too, are something people may want when it's needed.
Trouble with statists and utopians everywhere is they don't understand Free Will and the part it's played in America's exceptionalism. But they will, it's coming soon.