The current copy is slightly misleading and might be confusing for users who do not know how Fedora approaches third-party repositories:

Third-party repositories provide access to additional software from selected external sources. They include popular apps, as well as firmware that is important for some devices. Some proprietary software is included.

This makes it sound like enabling those repositories is not something that a normal user would want to do, and the text does not even mention drivers, but the repo containing the NVidia drivers is one of the things that is controlled by this switch.

I understand it might not be desirable (or possible) to call out examples of what software will be made available by flipping the "Third-Party Repositories" switch to ON, but mentioning "this will also make drivers for certain graphics cards (hint hint nudge nudge) available" would be a good start to make it more obvious what the switch does.