"They unlock the post, then say "oh sorry, we're happy to let you continue discussing end-game", when this post wasn't about end-game at all"

Having the right topic title might have helped.

If I say I'm going to discuss flowers (topic title: flowers), and I only discuss one particular flower's ecosystem, well maybe someone will think the topic is still flowers generally, not just THAT flower. Endgame is more than just avoiding aoes, and more than just Titan HM, for example.