That's really all there is to it. The press is pushing Dems hard to pick a progressive candidate. The more progressive the better. Because that's the horse race the press is trying to set up.
A Bernie vs Trump redux of the 2016 fiasco is what I think the press wants. It's a moneymaker. The glow was all on Beto after November but he's too mainstream for the mainstream press.

They're doing market research right now. Bernie can beat Biden if that's what it comes down to. Bernie still has the fire in his belly. Uncle Joe's day has passed, I'm afraid, it's time he drove his Vette into the sunset. He was never really presidential material anyway.

There's still a good chance that Beto catches fire even with the press trying to tamp it down. In age and attitude he's exactly what the country needs.
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"Be yourself; everyone else is already taken." Oscar Wilde