Re: "Politics has no place in science,"
I can't completely agree. Most politicians start with ideals and good intentions, more often than not. Even in these days of the career politician. But the foundation in ideological belief (magical thinking even) in the "market" or Marxism or whatever plus confirmation bias and the compromises to gain small victories mean that logical, lucid policies stand little chance in the face of the realities of politics. Climbing the greasy pole starts as the means to an end, even if it becomes the end with the attrition of political life. Some, like Corbyn or Rees-Mogg, retain the ideal even if they lack the grounding in reality. But yes, some, like Boris, or May are just after power.
I do agree that PPE doesn't seem to be a good basis for political understanding. Politics, Philosophy and Economics ought to be the way to understand government, but it doesn't seem to have worked out that way. And lets face it. If you're interested in engineering or science at age 21 you are most likely not going to be too interested in party politics and becoming an unpaid local councillor. And if you are a politically minded scientist I'd be a bit suspicious of you.