system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why did Yoda and Obi Wan have to split up to defeat Palpatine and Vader?

Wouldn't it have made more sense for both Yoda *and* Kenobi to gang up on both Sith lords?  Obi Wan had to cross the galaxy to take on Vader.  There was no rush to kill Vader.  He was off starting his dark path, but nothing he did was time sensitive.  

If Yoda had had a bit of help he could have taken down the emperor and stopped the whole mess from going any further.
gpt
Yoda knew that Obi-Wan had no chance against Sidious.  Even if both of them attacked Sidious together, Obi-Wan would likely die.  Among the Jedi still alive, Yoda was the only one who had any hope of standing against Sidious in battle and living to tell the tale, and Yoda knew it.  However, while Obi-Wan would not be much help against Sidious, he would be uniquely suited to tracking down and taking out Anakin.