The most difficult data to fake or generate is convincing text. To mimic any commercial business process for an application that you are developing, you need to be able to generate text that looks right.
Why would you need lots of data?
Most experienced database developers will, upon seeing an empty database that they need to work on, fill it with sample data. It’s not wasted time, compelled by habit. It gives you the data to develop with and to try out ideas. It allows you to test your table-design, SQL statements and routines. It tells you a lot about