They certainly don't want to confront the idea that sometimes, despite setting our minds and hundreds of billions of dollars against a problem, that we can't solve anything; let alone consider the notion that we might have made things much worse for trying.
Look no further than the War on Drugs. It's been clear for decades that by every objective measure it's a (barbaric, costly) accelerant for exactly the kinds of social problems it was conceived to fight. But it's still deeply unpopular to say that.