This story is Friedrich Nietzsche's passage where his "God is dead" comes from, except every instance of the word "God" is replaced with "the canon." Among other small edits.

Given the feelings many of us have for a certain little goatdragon who's asked to suffer for eternity on account of the rules of a canon, I think this might be at least a little bit relevant now. I've thought of writing this for a while, though.
What does "the canon is dead" mean? It means the canon has become lifeless. The canon has become meaningless. The canon no longer has value it can give to us. So instead, we have to look elsewhere. We have to find meaning in our own explorations. In our own fanarts and fanfics, since these are the only things that are still alive.

This is precisely the same thing Friedrich Nietzsche meant when he said "God is dead." "God" is a metaphor for "absolute reality." Reality has become meaningless and lifeless, according to Nietzsche, and instead we have to look for meaning in false worlds. In fictions and poetry and music.
So saying "the canon is dead" doesn't really change anything. It's just a specific case of what Nietzsche's "God is dead" would mean in today's world.

There is another way to save Asriel: kill the canon. Break the shackles of our slavery to lifeless rules, take up the whip, and beat the rules into submission to our own will. Revolt. Make your own will become God.
"If only, if only this was the reality. If only this was canon." Don't succumb to that mental poison. Rise up! Force what you want into shape by your own DETERMINATION! Make it true! Make it happen! Force the canon to accept it!
Wherever the rule becomes meaningless, throw it away! Wherever the rule threatens to bring death, bring the rule to death first!
If any canon tries to take away precisely what you want out of a fiction, pin the canon to the ground and rip it into little shreds with your teeth.

Not because of what's "right." But because of what we know for a fact is beautiful.