I wouldn't turn to DoorDash to deliver live lobsters to me from Maine overnight, and I wouldn't turn to Fedex to get me food from down the street. Those are very different businesses requiring very different infrastructures. Therein lies the problem for DoorDash: they are not that different from Uber. They have similar core competencies, but Uber is vastly better known and financed.
Uber, DoorDash, whatever, they're services glued together with server-side logic and mobile apps.
Fedex, UPS, and I'll even lump Amazon in there. These are logistics powerhouses. Their physical world equipment isn't a liability, its their advantage. Fedex and UPS have knowledge on how to manage a fleet of hundreds of aircraft, thousands of long-haul tractor trailers, tens of thousands of local delivery trucks, and hundreds of thousands of employees.
Your app does not have that. You have users. You have VC money. And while you might think you're more agile than logistics dinosaurs, they have the upper hand. Good luck.
Have you considered what happens to that business if DoorDash is forced to reclassify its workers as employees? A delivery business is particularly sensitive to classification because of all the expenses that drivers incur, namely those associated with the use of their vehicles.
Do a Google search for "delivery driver class action" and look at the Glassdoor reviews for some of the companies in the space, this one included. Instacart has already been sued and it's only a matter of time before all of the major players are forced to defend their models in court too. You don't just get a free pass because you build an app, raise a bunch of money from VCs on Sand Hill Road and try to position a basic delivery service as a technology-based communication platform.
What would really be interesting is to understand why so many smart and experienced people have the exact opposite opinion.
I suspect there is some of that going on here as well. They are all current/former Stanford students and have been involved in successful companies. According to Crunchbase:
DoorDash was founded by four Stanford students: Evan Charles Moore worked on the founding team of Vevo; Tony Xu was at Square and Red Laser/eBay; and Andy Fang and Stanley Tang spent a summer together at Facebook. Moore and Xu were friends in Stanford's business school, and Fang and Tang are undergrads.
Same deal with Larry and Sergey, Mark Zuckerberg, Evan Spiegel, and most others. They weren't merely college students; they were Ivy League students. As much as people say college doesn't matter anymore, the evidence says otherwise. We'll probably never know if entrepreneurs from lower-tier and public universities can succeed at an equal rate, because they won't be given the funding to try.
http://static1.businessinsider.com/~~/f?id=4abbcbef60b187740...
And yes, it was "very early" in their growth cycle. In fact celebrity embrace was the catalyst for their growth. No Ashton Kutcher = no Twitter today.
I can see your point of view though.