Earlier quoted context omitted.
This isn't a meaningful tautology. "The system is unjust because it is unjust and therefore must always be unjust." We can and should improve society.
Yeah, but the other poster was probably being sarcastic and just frustrated in a tone that is hard to describe in plain text.
Looking deeper I see you're likely correct, but honestly I disclaim responsibility for misunderstandings caused by Poe's law when I'm on this end. I see this trip people up all the time, so I know it's not just me. I see the sincere version of this statement made, defended, and doubled down on regularly, so no, I can't reliably tell the difference without a sarcasm marker (/s). I admit this is a weakness on my part, but I don't really feel responsible for it.