Being fact-checked is not very fun. Good fact-checkers have a preternatural inclination toward pedantry, and sometimes will address you in a prosecutorial tone. That is their job and the adversarial tone is even more important than the actual facts they correct. In my experience, seeing your name on the cover of a magazine will take you far in the journey toward believing your own bullshit. It is human to do so, and fact-checkers serve as a valuable check to prevent writers from lapsing into the kind of arrogant laziness which breeds plagiarism and the manufacture of facts. The fact-checker (and the copy-editor too actually) is a dam against you embarrassing yourself, or worse, being so arrogant that don’t even realize you’ve embarrassed yourself. Put differently, a culture of fact-checking, of honesty, is as important as the actual fact-checking.