'Trust the science' really means 'Trust the science as filtered through the media'.

'Trust the science' implies that these morons actually read academic journal papers. They obviously don't.

What they do is comprehend that the mass media says: 'The science says this, that and the other', and presume that that's all that there is to 'the science'.

'The science says "trust the vaccine", therefore only stupid people do not trust the vaccine. See, I'm very scientific and smart!' The media, of course, can just say that 'the science' says whatever the hell they want it to say.