It depends on what "diverse" means to you. I would say that Scientific American isn't the same as a partisan news channel.

But to the degree that an ad driven model and social media is the primary way news distribution happens, media incentives are monolithic for media organizations.

On a discursive note, if you are interested in media incentives, "All the News That's Fit to Sell" is a great book that goes into media incentives in previous eras. When the economies of scale for printing presses went up, media naturally became more centrist and less alarmist because a single paper had to appeal to a larger audience. It gives you a sense for the power of incentives in dictating what media is created/distributed.

You must be living in an alternate dystopic 2020 media landscape where the problem is something else besides radical fragmentation of markets, instantaneous elevation of social media anecdotes to national coverage, and widespread agreement to disagree about matters of fact.

The one thing we can’t criticize our media for is a lack of diversity.