This is a random and minor thing, not a huge deal at all, but it has me curious how even on Wikipedia now most pages reiterate many times how sources A, B, and C are biased and may not be entirely accurate. Like...no shit? We've always known sources have biases to various degrees, human nature and all of that. Of course there are going to be biases we have to control for, be it Caesar's Gallic writings or Tacitus or whoever. It seems now it's a requirement to state this as part of any post. I bet not a single person on this sub was unaware of bias being a thing yet it bears repeating to infinity and beyond.
It has become so over-emphasized to the point that many people simply spin their wheels about how nothing in the sources can be trusted and everything can be questioned to such a degree that they end up saying nothing at all. This doesn't make you sound enlightened. It makes you a milksop. The most important part of historiography is acknowledging biases exist but still being able to wade through said bias and form a rational opinion about the truth of what happened.
This post was inspired by a pro-Caligula post that argued he was actually a decent guy all his life and was just the victim of a PR-smear campaign by writers with evil, unforgivable bias. The horror!
I actually don't think that people "obviously know" these things, especially since we live in a culture in which people pass around fake videos, pictures, etc. via social media and assume them to be true. There are a lot of people in this world that lack common sense.
More than that, people uncritically passed along stories about Rome for thousands of years (think of works like Shakespeare's), or took as true the unfounded opinions of historians who got way out ahead of their skis (Gibbon), or assume that things depicted in movies or TV shows are true "just because." There are a lot of popular perceptions about Caesar, Cleopatra, etc. that are based on received mythology and folklore over millennia.