He also jumps to conclusions. Like thinking that just because he's the one who released Chaos, it would obey him. BUT...in the event that Chaos DID betray him, he invented another Egg Carrier to put it down. The very thing he said pales compared to the power of Chaos.

And in fairness, Eggman really couldn't have seen the second one coming. Who would suspect that putting in the power supplies in the cannon would cause the entire station to crash into the planet? That's some brilliant planning. Because anyone who would put the chaos emeralds in there would be proof that mankind should be destroyed in his mind.