I think this is really a human-nature problem rather than an education or lack of training problem. I believe this to be the case because of all the cognitive biases that we are born with. I also think people's willingness to 'think critically' is dependent on the personality they have. Some people are naturally more curious and open minded than others and no amount of education will change that.

I don't think it is a hopeless cause, however, and it's good to teach critical thinking methods. But I look at this in a similar way to health education. We have been teaching people about good nutrition, healthy eating, and the benefits of an active lifestyle for years but most people don't apply the lessons. At some point more education on the same topics isn't going to help anymore because it's a different kind of problem than not having been taught.