There has been fluffy pop music for as long as there has been pop music. It just changes in the particulars. There was plenty of garbage on the radio when I was a kid in the 1970s. But for every “You Light Up My Life,” there was “Dreams,” “Sir Duke,” “Rich Girl,” “Telephone Line,” “Carry On Wayward Son,” “I Never Cry,” and “Barracuda.”
The real villain here is the 1996 Telecommunications Act. That removed the barriers to radio station ownership, allowing companies to own as many radio stations as they wanted. Before 1996, a company could only own 40 stations total, and no more than 2 FM and 2 AM stations in any one market. Once that was removed, the divisions that had already started in radio formats ossified as big media companies bought most of the radio stations and converted them all to specific genre formats that were centrally programmed.
Where I grew up, there was no such thing as a “classic rock” station until I was probably about 20. There was a rock station and a rock station that played top 40 during the day, an easy listening station, a couple of country stations, etc. In 1994, you could still hear Green Day, Pink Floyd, The Cranberries, Mariah Carey, and Janet Jackson all in the same block. Now? Not so much. I can’t picture hearing Stevie Wonder and Alice Cooper on the same station anymore, either.
The problem with radio is that each station plays a very narrowly defined genre of music, so they’re all bad. If you listen to one radio station, you might think that all new music sounds the same, but that’s completely untrue.