Except you just failed to get general behavior and reaction that matched the CE and instead asked for more information.
The entire point of the current pro-alignment argument (such as it sprung fully formed out of the muck a few years or so ago after 'TRADITION' and 'But the players will run wild' failed to strike home) is that it is a useful tool for figuring out how a monster will behave without having to 'waste time' on actually reading the description and getting real actual information about the monster.
Adding an alignment to this creature caused you to think they had a cruel, murderous society ruled by the strong with personal honor when they're solitary tortured creatures who kill not for greed, but out of twisted envy toward others they can't fathom. It didn't provide you anything useful about the monster at all, which is supposed to the point, right?
So here's the follow-up question:
What is even added to this specific creature to tag two letters to the end of it?