Too many times people who have been monitoring or are deep in a field overestimate how much knowledge an average person or even newly interested person has in the same field (oh hey, there’s an xkcd about that!).

People scoffing at anyone who thought Elon Musk was just a meme a nerd CEO before the cave thing, people who expect everyone to know who is running every browser, OS, or other company, and lots of other minor things they think should be common knowledge, when at the time it was something only someone invested in the overall field or someone who knew how search much better than the average person.