Most people don't spend a lot of time formatting Access tables because they don't always use the table for data entry; instead, they use a form. Most people also don't typically print their tables. They use data-entry forms to see the records onscreen and reports to print their records. The tables are merely holding tanks for the raw data.
However, creating forms and reports might be more work than you want to tackle right now. And formatting a table so that data entry is a little less tedious (and less hard on the eyes) or so that you can quickly print a copy of a table (covered in Lesson 20, "Printing Access Objects") is certainly no crime. Making a table more readable onscreen is certainly nice for the person using the table to enter data.