It's a sign of modern approach to solve a problem. Languages like Go and Rust have by definition and by principle less memory and security issues (not talking about other problems), which is otherwise a huge problem in C in example. So it's good to know the language being used.

The language itself can play a huge role for non programmers as well. In example Python can be a pain to use in some environments or it can get slow (although for something like RSS reader speed would be fine). For people using software from source in example, to compile themselves can have an impact too. It gets even more interesting for people who might want to look at the code itself, audit or edit it. In example if a program is written in Python, I know that I can read and make changes to it. In C, I would not be that confident.

Overall for most people it does not matter. That's true. For people like you, you can just ignore it. Not every title is for you. The title is for those who care about the language.