It takes time to need to do more stuff in the terminal. I'm doing some web development so I need access to the terminal to inspect a database, run the server (which needs to stay open and sometimes shows errors) a way to interact with the server ad hoc or do things to the files and whatnot there, and one more for general tasks.

Sometimes I connect to my web server though the terminal; if I end up doing this more, I want these things to be visually distinct to avoid running the wrong commands in the wrong place. This is semi common practice where people colour code things differently between live, test and other environments to avoid deleting tables from live.

As a new/casual user, I wouldn't be concerned about not using terminal enough or whatever. It's not an contest. You just might find yourself wanting or needing to do it more as you have more and more specific needs.

The only reason I use Yakuake is because I want to not have to launch a terminal whenever I want to do a small task, and because it builds my self esteem to have it set up where I can pop open a terminal whenever I want to. It also encourages me to use it more and improve my bash skills by using it more.