It's all adding up now. I mean, let's look at his track record...
He beat Ventress, Maul, Maul and Savage at the same time, Grievous, Mace, Dooku, Anakin... Mace even said that Obi-Wan would have a better chance than anyone, even Yoda, to beat Grievous, which basically confirms that Obi-Wan is > Everyone else. Then there's the fact Yoda's superiority complex caused him to send Kenobi off to fodderize Vader while he tried to prove himself against Sidious, because he knew Kenobi could have beaten either one of them whereas Yoda lost to just Sidious.
The only opponent worthy of Kenobi's attention during his time is the Hero of Umbara.