In years to come Toyota may regret the decision not to sign Ogier.
The question is - do you truly believe that Jari can beat Seb across a season? I have seen no evidence at all that he can do this. You're basically relying on the performance advantage coming from the Yaris. Again I would be worried that if you give Seb a second season in the Fiesta they get more comfortable and he again becomes unbeatable.
Ogier gives Toyota the best chance to win championships. That's just a cold hard fact. It may not fit the Finnish hero team narrative. But at the end of the day Toyota aren't pouring in money to make Finland proud.