I'm not sure what your point is here. Yes, he has a choice and that's a good thing. Why do you bring that up? They are making a choice based off fundamental disagreements with policies that the now-ruling party stands for. Of course it's impossible to work out exactly what policy will be implemented, that's not really the point.
No, the author claims he has no choice: "By voting in a Tory government, you basically did not leave us any other choice." This feels like a dishonest representation of the situation.