Luckily for Ash, there's evidence his situation is not because of Hubris on his part. Rather, there's an awful lot of prophecies all finishing up within a few decades of each other, all of which mention a 'Chosen One'. Some of them are pretty specific about who they're aimed at, such as the prophecy that includes the phrase 'And the World shall turn to Ash'. Most of them probably could be solved by any passing ten year old and their team of monsters.

But the Gods, as they often do, got lazy. Why prepare dozens of Chosen Ones, when you can just grant someone a form of immortality and make them do all the work? 'Gotta catch them all' is just the justification for their cruelty.

That said, the Gods could be in for an unpleasant shock. After all, Pokéballs work on ALL monsters, even the one that made the universe...

Matrix Dragon, J. Random Nutter