the game does sorta cover it, at least RED does. Implants usually have a relatively small impact on your humanity by themselves (that’s the permanent humanity loss), the procedure of getting them and the purpose that fucks you up. Iirc medical grade and affirming implants do nothing to hurt your humanity either, it’s not the chrome it’s turning yourself into a tool that hurts. Humanity is also higher among people with a decent life (as in, loving family, supportive friends, etc) and can be lost through bad experiences, which implies it’s just a mental health thing.

Edit: i might be thinking shadowrun on the medical implants, but shadowing isn’t trying to be philosophical about humanity so i doubt it’s that.