Hahaha.

No. Guns are very real. Rockets are also very real.

The Iron Dome is probably the best missile defense system on this planet. Not much gets through it. But even it probably wouldn't do much against even better missiles. Which is why they don't want Iran with nukes.

Even the best missile defense can be overwhelmed not by those shit rockets, some did get through, 1000s were shot, but barely. Speculatively some of them were brand new and also the volume shot meant some got through.

Okay a nuke you cannot afford to miss. Now there is a huge problem. As it is designed to reach far greater speeds and hit a much bigger area. Nukes can be shot down. Overwhelm the defenses with these latest nukes with multiple warheads and any defenses are screwed, or with nukes that fly at much quicker speeds like hypersonic.

The technology is advancing into railguns and lasers as defenses, but this hasn't quite got there yet.

Even then defenses can be flattened, by drones, some are real low tech, flies under radar hard to detect. The case with Syrian air defense and a kamikaze drone. Or the Saudi oilfields which used much better drones.