In fact, the ability to tap into mass media only makes the impact of a song greater. Access to electric instruments and effects only gave them more ability to create interesting music.
I’m a fan of all kinds of music old and new. But anyone saying German leders or old timey civil war ditties are better than Smells Like Teen spirit are high on their own supply.
Most of history humans expressed an extraordinarily limited range of emotion in song, in rigid form. Kurt Cobain wrote more than one song that you could play for a toddler and they’d love it. He wrote more than one song that hundreds of millions of people are listening to 30 years later. I’m sorry but your favorite Gregorian Chant is just not very good in comparison.