Thanks for the great laugh - had no idea it took so many people to write a lame pop song which I thankfully have never heard. And yes, it's all been done - you just have to keep doing it better!
Like you're the first one to come up with the "everything has already been done, just give up" idea. It's been done. The fault lies in your own lack of imagination. That shit Ben Franklin invented was hard back when he invented it. The only reason you think it's easy now is because he invented it hundreds of years ago. And as lame as they are, those "songwriters" still each have 1/7 of a song on you.
People continue to invent things, of course. They just tend to be apps and things to make your internet box go faster and so on. You use them, you just can't see them, so you think about them less.