Du You had underestimated these people who stepped into the Dinosaur World, each one of them brimming with confidence. While at first, quite a few people were seen heading south, most of it was merely a ruse for misdirection.
After they set off, they made a detour and headed north. Many of the people here were regulars at the guild, possessing some knowledge of the Dinosaur World, so they weren't entirely clueless about this place.
On the contrary, many were overly confident, unaware of the vast amount of Wing Dragons here, they all gathered in this direction. Conveniently enough, this canyon was indeed a good spot.