The problem with lies is you have to have a good memory. You need to make sure all the lies line up and don’t leave holes in your story that reveal the lie underneath because ironically the smaller the slip the more damning and harder to explain it can be. That applies to falsifying documents too. It’s actually more dangerous to try and create something fake because now you need fake evidence for all the fake stuff you’re putting in there, and you need to hide any evidence or corroboration that points to the stuff you’ve removed, and it all gets really complicated and really error-prone really fast. Liars survive by keeping things simple enough that it can’t be challenged, or in Trump’s case, by hiding all the small lies behind big obvious ones, like “there are no Epstein files” which everyone knows is a lie but the lie is so big it’s immovable while all the juicy details are buried underneath.