> When you look inside a PDF, it is formatted as "put characters ABC at page location X,Y", you then have to try to extract the text from that by manually traci

> When you look inside a PDF, it is formatted as "put characters ABC at page location X,Y", you then have to try to extract the text from that by manually tracing the flow / columns / etc. And as you want to do more and more complex things with letter spacing you end up with ever shorter flows of characters; there are certainly some tools that end up creating every character individually so even extracting a single word in Latin script is hard.