That thread was locked because there was already an older, active thread that dealt with the issue your thread did. If there is already an active thread for a topic, please use that thread for discussion instead of making your own. Additionally, most mods will leave a message before they lock a thread giving an indication why that thread is locked. If you still need clarification, please PM the mod. Do not create threads on PMC to discuss your moderation history. Thanks.

a post gets locked everytime it breaks a rule like this one as it's pointless

Well. There could be many reasons or just 1 Like as an example: Making a useless post or starting a flame war (Mods) would lock a post