You could say the same about bias on contentious issues: "tribalism is an evolutionary trait, so such-and-such a news outlet's tendentious coverage isn't surprising".
Or about poor software design: "Concrete thinking is natural, so it's not surprising the engineers didn't think through possible surprising codepaths".
Journalism aspires to be, at its best, a profession whose associated skills, standards, and ethics exist precisely to countermand the kinds of 'unsurprising' traits you mention. As with reducing bias, application of rational news values is never going to be perfect. But like other skills, it can be improved.
Or about poor software design: "Concrete thinking is natural, so it's not surprising the engineers didn't think through possible surprising codepaths".
Journalism aspires to be, at its best, a profession whose associated skills, standards, and ethics exist precisely to countermand the kinds of 'unsurprising' traits you mention. As with reducing bias, application of rational news values is never going to be perfect. But like other skills, it can be improved.