We absolutely do need better scientific understanding in politics. But the whole point of politics is to deal with issues where objective fact and science are

We absolutely do need better scientific understanding in politics. But the whole point of politics is to deal with issues where objective fact and science are not enough to make a decision. Some questions require making a value judgement. Science is useful in helping to predict the future, but it has no opinion on what we should actually do. A lot of these questions are moral, and the science is just used as an excuse.