The fundamental problem with Juicero (at least as an ambitious startup) is that juice isn't a product with broad appeal, especially after the recent trend against sugary drinks. You could overcome price barriers and other issues if there were some real demand, but I just don't see it.
Did you just call pressed veggies and fruits sugary drinks? As in more or less the same as Pepsi? The problem with Juicero is that it was a scam, pure and simple. Overpriced bullshit and awesome profits, at least that was the plan. Thank god it's over. Now we're just waiting for Uber to fold and then maybe we can start actually making a difference, as opposed to spewing bullshit until no one can tell the difference.
Even "traditional" pressed juice companies are starting to see a crunch, as their evangelical customers ("health nuts") are realizing that eating an apple is healthier than pressing 4 of them.