>>116711396He wanted to get a point across, I tells ya.
Example: It plain doesn't make sense to kill off the characters in Game Over and retcon the story afterwards, it's such a waste of time, right? But, consider another perspective, that he's trying to show us different iterations of the same characters so we can get "the bigger picture" of these characters, so to say. Platonic ideas, you see. Or, alternatively, that one Mario analogy about the lives.
Now, does that mean the answer to that question is anything other than "yes, absolutely"? No, it's still a waste of time, as I'm sure many of you will agree. But, he had a point he wanted to get across, and you can find many of these points throughout the story, and even through the Epilogues and Homestuck^2 itself, crazy an idea as that may seem.