The cyberbrain doesn't terrify Motoko—she uses it daily.
What breaks her is the suit's degradation, the moment her invisibility fails and she becomes visible, readable, categorizable to the watching world.
This is the grammar of a surveillance culture so total that invisibility becomes the only remaining form of authentic choice. Japan in 1995 was drowning in CCTV, security cameras, workplace monitoring—the infrastructure was already there.
If you can be seen, you can be categorized. If you can be categorized, you can be controlled.
The cyberbrain plays as augmentation in Oshii's film, enhancement, something Motoko speaks of like a mystic, philosophical, almost grateful. But the suit? The suit is military-grade desperation.
The suit isn't fantasy—it's the logical conclusion of transparency as a tool of state power, and every camera, every digital footprint, every networked moment makes the individual legible to forces that compile that legibility into control.
Rewatch the Laughing Man's first appearance (Episode 1, 18:30-22:00) and pay attention to how the camera treats invisible space—notice it's never shown as empty, but as absence, as a negation of the visual grammar used for every other character.
Yoshiaki Kawajiri's commentary on the original Ghost in the Shell film (available in the Criterion Blu-ray release) discusses how the suit's design was informed by conversations with Japanese surveillance researchers about the psychological impact of panopticon architecture on urban citizens.