Another factor may be that the character in question was herself a bad actor. She's a political officer, which if you know anything about what went on in Russia & China (among others) following their revolutions you'll be familiar with exactly this kind of rehearsed yet unconvincing diatribe of party rhetoric.
IIRC the Chinese especially in the early days post-revolution, had these little amateur dramatic show trials (that were quite literally scripted) where some unfortunate academic got political slogans shouted at them by a bunch of young party members (sometimes former students) all trying to out zeal one another with every shade of false righteous fury you can imagine. All under the pretext of showing how their teachings are "reactionary propaganda" and other such nonsense.
In short: I always just assumed that she didn't buy a word of what she was selling.
IIRC the Chinese especially in the early days post-revolution, had these little amateur dramatic show trials (that were quite literally scripted) where some unfortunate academic got political slogans shouted at them by a bunch of young party members (sometimes former students) all trying to out zeal one another with every shade of false righteous fury you can imagine. All under the pretext of showing how their teachings are "reactionary propaganda" and other such nonsense.
In short: I always just assumed that she didn't buy a word of what she was selling.