"...Just because we don't know, or aren't sure of something now, does not mean that will always be the case."
The problem isn't that we don't know, or that we think we may know, but that we are sure we know, when we don't. Science is essentially a history of wrong ideas, that were later disproved, and all too often hubris has produced misfortune intolerable suffering.
I do not disparage science even a mite. Rather the failure to consider our humble lack of capacity to understand, and to proceed with ill considered and devastating policies as a result of our foolish hubris.
There remain realms unconceived of by man that moderate every process we reckon we have thoroughly understood, and the perennial discovery of harm we do our posterity, and the examples of such harm span every industry, social program, and science, demonstrates amply how dangerous hubris is.
The very expectation that we might presently grasp the intricacies of what our minds are and how they operate may well be the penultimate example we could consider, as the implementation of social control programs by folks that reckon they know how it all works and intend to 'fix' society could well be the very end of humanity.
The words of Plato should be carved into the flesh of every demogogue and scientist: "I know one thing, that I know nothing.", so that the proud flesh might remind them of their own fallibility, and the awful human costs that have resulted from hubris throughout history.