I'm totally with you on this.
C is a fantastic language for people who want to develop for existing C projects. But there are very few reasons to develop new software projects in C today. As such, for anyone learning C, the best first project would probably be whatever existing C project you want to work on.
Maybe the main exception to that is probably embedded systems stuff for microcontrollers and the like, but I don't know enough about that space to say whether that is even still the case or whether you'd be better off with something else.