You are assuming it's all about money.

Sure, it could be only about money and Deebo is posturing.
But.... if it is not and he truly wants to be somewhere else.... then the issue becomes pretty serious for the Niners. And, they'll have to gauge that.
But also don't think that $5m per year is "paltry". It's a significant amount and every team has to determine where the value begins and ends. Example: Von Miller.