I mean, they need to be there to explain things to Tara. Right. Logical, non-meta reasons. That's the only logic people are allowed to use to speculate. Meta logic is cheating and wrong and banned and YOU STOP THAT RIGHT NOW, YOU.
The last panel is inspired by how I would describe the real life area I know of that inspired where they're going to meet Tara the griffin, and Ellen knows what Elliot means by that description because of course she does.