So his logic seems to be:
- Some media is more important than others
- Some media in our timeline is set in stone because it has a butterfly-effect relationship to critical world events
- MLP: FiM is one of these pieces of media, and should have continued to run 5 more seasons (presumably because those seasons or the timing of the next generation would have been the source of aforementioned butterfly effects)
But even if you understand it all, it still wouldn't make sense! You can't ctrl+f reality. You can't unmake the new MLP or Pokemon games, so even by his own logic it's too late to change anything..