Why do so many posters have trouble staying on topic?

Most people don’t want to go the trouble of creating a spinoff thread that will likely have one or two replies, if any.

Also, the severely over-moderated United States and Israel are bombing Iran {for current/ongoing events, past/future have specific threads} thread continues to answer the question this thread poses. People continue to constantly go off topic despite all the warnings, because we don’t live in an Eternal Now and obeying the thread rule makes normal or even useful conversation largely impossible. So people tend to either not obey the rule, or not post at all.