It seems like the target market for meal kits would be people who want to learn to cook? (Without working too hard at it.) Delivery will get you tasty food but you don't learn anything.
And even if Blue Apron could clear all of those hurdles profitably, as the article contends, they have no moat. They are not vertically integrated so there's but only so much efficiency they can glean out of the supply chain and there are much bigger fish out there that can bludgeon them to death with scale.