You could say the same thing for any "on-demand" startup out there. It's this kind of intellectual laziness ("It failed in the past so it couldn't possibly succeed now.") that prevented electric cars from happening sooner.
Some on-demand startups will work out magnificently and many others will not because the economics just don't make sense. In the case of Munchery, I think their valuation is very reasonable when you consider it's an order of magnitude less than that of one of their indirect competitors Blue Apron who is seeking a $2 billion valuation (as mentioned in the article).
