Superficially, secular Leftist modernity is slavishly devoted to science, to objective 'evidence' and all the rest of it.
Yet the reality is that science has been destroyed and replaced by careerist bureaucracy.
Solid science that conflicts with Leftism is turned into a hate crime; and there is funding and vast propaganda and mandatory education to create and sustain huge schemes of dishonest and incompetent pseudo science (especially the global warming/ climate change scam).
So what is the real role of that thing called 'science'?
The real role of science for the Left is quite simple and it always has been the same - it is to create a high status and universal discourse which excludes religion (especially Christianity) by assumption; so by assumption science works on the basis of assuming the absence of divine action, of souls, of purpose and meaning; of transcendental values of beauty and virtue.
Most clearly this is seen in fanatical support for of mainstream secular Leftism for the metaphysical and empirically evidence-free assumption of 'Evolution' by Natural Selection as a mandatory and enforced explanation for The Origin of Species; while the same people regard the vast evidence of Adaptive evolution in the human species (The Descent of Man) as unmentionable, punishable, indeed illegal, hate facts.
For secular modernity, science is therefore not-at-all about the positive presence of truth and honesty - obviously not! - instead science is about the objective absence of religion, beauty and virtue.
It is not a matter of what science is - but a matter of what science IS NOT, that matters to secular Leftist modernity.
In sum, as with Marx - what is vital to modernity is scientific materialism; which has approximately nothing-at-all to do with real science; just as 99 percent of modern 'scientific' 'research' has approximately nothing-at-all to do with real science.