system
Given the following post, respond as if you're commenting on Reddit:
human
[Metal Gear Solid] What makes the Metal Gear such a revolutionary invention?

  In the lore of the game, Metal Gear is so deadly because it can traverse any terrain to deliver nuclear strikes in enemy territory. That’s cool and all, but what makes that more efficient than say, a nuclear stealth bomber? It has the same defenses, same firepower, and the same nukes. The only difference is that a jet can traverse more terrain because it can fly. The only Metal Gears that actually seem advantageous are Ray and Sahelanthropus because each is a fully fledged mech and not just another nuclear tank. 

  With that in mind, why does everyone in MGS hold Metal Gears in such high regard?
gpt
A stealth bomber can be detected and intercepted if you throw enough radar signals or Mark 1 eyeballs at it. A mech that can walk off a ship onto some deserted shoreline, launch its payload, and walk back on the ship is far less likely to be detected.

Edit: It should also be noted that Metal Gear does not fire nuclear weapons in the traditional way that would trigger a launch warning by early warning systems. The Shagohod used rocket boosters on the launch platform to simulate the second booster stage of an ICBM launch. Later Metal Gears used railguns to fire off their payloads.