Politic is about ideology. The moment you try to stop thinking about the ideology to create politic, you transform the institution into a business and in a capitalist society it will create more oppression and will radicalize politician even more into thinking that we should not put more ideology and so on.. at the end of the day, it will push simple rightist liberal toward the far right like what is happening in France.
The depolitization of politics always favors those who have the power of domination over others.
Being rationnal has nothing to do with having no ideology or being depoliticized. Rationnality means being able to see the problems and act on them.
You can't fight a problem that you refuse to name