Mechs are attack helicopters
A’ight Hear Me Out.
The tactical role of a mech shares almost complete overlap with an attack helicopter. To be clear, this applies specifically to mechs depicted as agile enough to bob, weave, and dynamically shift their own weight. Not lumbering, slow moving combat platforms. The fast ones. The speeeeed bois. (Sorry spider tanks) (Titans you can stay)
In real military doctrine, attack helicopters occupy a precise niche. They are neither the blunt, grinding dominance of a tank nor the fast, high-altitude detachment of a jet fighter. Instead, they excel at low altitude, close fire support, rapid repositioning, terrain exploitation, battlefield loitering and responding to fluid, fast changing ground situations with a level of precision and presence that neither a tank nor a jet can match. A tank is powerful but earthbound slow to reposition, committed to roads and open ground. A jet is fast but blind to nuance, locked into its flight path, gone before it can truly read the battlefield. Both of these basically do their job better than a humanoid robot would or could.
The attack helicopter though, sits in the divot between these two. It’s nimble, responsive, and intimate with the fight and A humanoid mech, especially one with direct neural interface control, occupies that same divot. Because the frame mirrors the human body, a brain controlled mech would be instinctively intuitive to operate. The pilot doesn’t learn a new kind of movement. They just move the same way they normally would with just a bit more inertia. Reaction times and situational awareness happen in a way that traditional vehicles can’t replicate without a crap load of training. Mechs even lean into the battlefield intimacy, the humanoid form lends itself to rapid combat engineering like opening doors, clearing debris, manipulating objects, or generally supporting troop movement. Things that could take days to accomplish conventionally but a mech could conceivably do while still being shot at.
A mech can also straight up chill in a location. A helicopter has gotta stay airborne to function and loiter the battlefield, burning fuel, generating noise, remaining permanently exposed. A mech can crouch behind terrain like a ridgeline, a treeline, or a buildingline then stand to fire then duck again. It uses terrain as cover the way an infantryman could, being able to play peekaboo, bobbing and weaving through danger. This subverts one of the biggest criticisms about mechs, that being the joints and legs are a vulnerability. But that’s only if you can actually hit it while it’s doing straight up parkour, making the joints no more a vulnerability than the rotor on a helicopter.
A helicopter even illustrates that a military is willing to commit to a ludicrously complicated (and equally massive amount of accompanying maintenance) vehicle if it is useful enough.
Im not trying to say that mechs are more realistic as helicopters (no matter how much I want in my heart for them to be ༼;´**༎ຶ **༎ຶ༽). It is a tactical use for mechs that makes a surprising amount of sense and it’s an angle I’ve almost never seen a story actually lean into and explore. the implications for how such a unit would fight, move, hide, is oozing with storytelling potential. and I would love to see it explored (by someone more talented than me)