one could argue that you should already have the knowledge before starting the topic and share that knowledge not to want to gain it after the fact.
This is right. Ive seen also some created topics that instead of presenting the idea, the topic went far, and become irrelevant. Knowledge is important prior to clicking
Post but this change depends on the topic subject. And also I am agree with this line said by finaleshot2016;
Other users that reply to your thread and shares information will let you learn the things you missed on that topic.
sometime we missed something and others filled in the gap on our topic. This always happened and thats normal cause not everyone has 99% knowledge on the subject. There's always 1% that we dont know.