The threshold for being good hasn’t changed. The ability for anyone to publish a book, a blog, or a YouTube channel full of videos is open to all. Everyone today has the type of access to share with the world that major media outlets once held sole possession of.
Over-saturation is not why you or I fail to gain traction. We fail to gain traction because we’re not good enough and we’re not changing where it’s important to change and adjust.
Again, the threshold of what is good enough to be successful has not changed. People have always failed at producing radio, music, movies, TV shows, etc… it’s because the ideas or the execution wasn’t good enough. That’s still the case today.