Here's the problem: when you replace a man who deserves the position with a woman who is not as qualified for "gender equality," it helps no one. The man knows he's been overlooked because of politics, resents it, and probably goes to the US for better opportunities there. The woman knows she is a "quota hire" and realized she wouldn't have gotten there without politics, possibly cracks under the pressure or possibly just does sub-par research.
Science at the top level is about as close to a meritocracy that you can get. The people there are very bright (in the hard sciences/engineering), they worked extremely hard to get there, and they continue to work extremely hard (many 7 days a week, 60+ hours per week). This isn't about handing out gold stars to everyone anymore. Trudeau and the others who have never achieved anything professionally simply cannot understand that.