@PhilJohnson is correct, as usual. However, there are instances where you want text but not the font. For example, if I wanted to make a Star Wars logo shirt, it would be unnecessarily complicated for me to try to find the Star Wars font for free download it (without getting a virus), install is, fire up Easel and type it, massage it to make it look like the logo, etc. I could just easily download an image of the logo I wanted and use the trace app.
Phil's method is extremely useful for custom text scenarios as if I was going to make a custom Batman font sign for my son's room and wanted it to say "The Nate Cave" or something like that. If you plan on making custom signs for your family, or for sale, this is the easiest technique currently available.
Keep in mind, the Easel software is evolving. I was very happy with the vectorization software and used it on dozens of projects. Now there are other tools that fulfill the same function. In fact, there has been some talk from the powers that be at Inventables that they're looking into the font situation.