Because using the underline key is worthless
How to Create a Fillable Form in Google Docs with Tables
One of the most common uses of Google Docs is to create a Google Docs form. Unfortunately, the most common method of creating a form with an underline for form fields doesn’t work very well, because filling out the form moves the line and looks strange.
Luckily, there are a few tricks you can use with tables in a Google Docs document to create a perfect form for people to fill out, while keeping the lines in the form in place.
You can create a fillable Google Docs form with many different elements using tables. Read on to learn how. If you want to see the final product, check out the final form here.