If I look up, say, resistor colour codes, a car or TV show, the the info Im looking of is as good as fact. The colour codes are correct, the car specs should be pretty much correct, and the general TV info is correct.
If I know Im delving in to something opinion based, for example, political or general history, I treat it as a starting point.
Problem comes when the subject falls in tot he middle, for example looking up a person. Some of I I assume to be correct like date of birth, home town, etc. Or at least its probably as correct as anywhere else. But often trivial type thing turn out to be little more than folk lore. But, if that matters, its very wise to look for something the person's own pages, if they exist. Or at least google the claim to see if its likely to have weight.
So, I think its fair to think some subject are likely to be acceptable as fact, other not so much.
Part of me thinks there should be a separation between things that can be seen as fact, and things that are likely to contain some sort of bias. No idea how that can reasonably be achieved though.