So instead of trying to come up with other options to help the whole State economically, and despite knowing that long-time landowners like the Duttons will have their property encroached upon, she lets the deal go through, and to save her sorry ass, she decides she's getting out of Dodge by running for the Senate. She then encourages John Dutton to run to take her place, so he can deal with the sorry ass mess she left him.
Or, to put it another way, the lady governor was charming and good looking but not strong enough to do the heavy political lifting involved, so she called in John Dutton to do it.