Why does all new pop music sound the same?

I always thought the similarity to Pop music nowadays is because they share the same writers, and producers. If you have a producer who works with a pop starlet and they make tons of money then the record label will use that same producer for other pop stars till the world gets tired of the producer's schtick.

Look at the artists who top the Billboard charts and tell me they are not part of a manufacturing process by the same hit factories.

Motown is a great example of a hit factory, and there have been others. I'm saying in the past there was more diversity on the Billboard charts. And I'm someone who was always seeking an alternative. 

I do agree that this is their time in music and pop culture, just as I had my day. But I'm not pining for it, I've moved on.

As the article stated, it's 1 or 2% making 80% of the pop music today.

The documentary "Hired Guns" on Netflix helps put this discussion into perspective in terms of what producers have been doing to many of the songs we all know for years.