This is one of those shortcuts we use to cut out complexity, but in process, we create blind spots for ourselves.
It is not reasonable to expect things to either have opinions or not. An adult should have the sophistication to read something and understand what is opinion and what is fact. I get that many adults these days apparently lack that ability, but that doesn't excuse it.
I use it as a shortcut because I got tired of reading BS using the skills you describe. Now I don't read the opinion section at all. Once bitten twice shy.
Sure, but this is impossible to escape. Even if you're looking at a dry set of facts, there was editorial decisions made regarding what to put on that list and what to leave off. There is literally nothing you can read where you can escape the opinions of others.