I think it expresses doubt in ability of a layperson to make a rational judgement on merits of a particular scientific research or process rather than on science itself.
That isn't to say that the problem does not occur in other types, or that they're wrong about what they believe just because they don't understand it.
I mean, yes? I don't pretend to know everything about everyone.
>the vast majority of people who say things like "trust the science" don't have the first clue about what the science actually says. It's a dogmatically held belief to them.
I can't agree with this, if they would change their mind about it, it's not a dogmatic belief. You seem to be generalizing about a large number of people, have you asked all of them if they would be open to changing their mind, given new evidence?