Those frameworks are sound if you don't have the priors leftists do. That doesn't mean they're good, it just means they're internally consistent.

Take homelessness. If your prior is that housing is a human right, then you think the government should make sure everyone has housing. But if your prior is that housing is something individuals have to provide for themselves, you aren't as concerned about homelessness.

A lib with the latter prior isn't stupid; they just have a fundamentally different belief about how society should work. It's not that they haven't read the books we have on homelessness, it's that they simply disagree with the importance we place on the issue. Often they disagree because they understand that agreeing would have a material cost.

Of course, plenty of libs also have incoherent worldviews, or really are just uneducated on important topics. My point is that viewing them all that way isn't correct, and falls into the same "no reasonable person could possibly disagree with me" trap we rip on others for buying into.