Before we start creating tables and inserting data into them, we have to design the database. Unlike changing local Python variable names, changing a database schema once it has been created and loaded with data is not that easy.
We would have to DROP the table, which means we would lose all the data that was in the table. So, before dropping a table, we would have to extract the data, save the data in a temporary table or other data format, and then DROP the table, recreate it, and finally reimport the original data.
I hope you are getting the picture of how tedious this could be.
Designing our GUI MySQL database means that we need to think about what we want our Python application to do with it and then choose names for our tables that match the intended purpose.