Politics is not science. A political decision does not rely on facts, it’s a moral decision or a jump into the unknown, or it is a arbitration, a choice to make on allocating resources or choosing a path for society.
Now there is a lot of lies and wrongs they’re saying, and it is a problem. But this is a problem with accountability and information. Media are a big problem. Political accountability and responsability is a big question and a difficult problem to solve. Science methods and knowledge can help, but they are not applicable for most of these problems.