Exactly. When you know enough science (which will likely require you to be biased towards it, as otherwise the education system will make sure you don't learn any of it) things start to increasingly fall into place. You'll see that the whole body of things you know is internally consistent. It has to be, because the reality itself is.

So as you learn more and more facts and see how interwoven they are you're able to evaluate further information without having to base on trust alone. If, say, vaccines were harmful or synthetically produced compounds were somewhat "toxic" compared to the same compounds found in normal food, you'd have to literally throw half of your scientific knowledge away. So you can easily determine that those claims are bullshit. But that requires knowing relatively lot of stuff, which majority of people do not. They have to rely on trusting authorities - which keep lying all the time. So no surprise here that people just don't believe science or government and are drawn towards various pseudoscientific nonsense that is presented as contrarian and promoted by charismatic individuals.