Why invoke logic at all if the argument isn't logic? I don't think it's pedantry to point out that the form of your first sentence is a lot more useful than "feels like a logical fallacy" as an argument (or the "sounds like a logical fallacy" that they've since edited their comment to say).

Near universal food delivery isn't part of the existing logistical system, so it's certainly not surprising that it would be difficult to start doing near universal food delivery. I guess I wasn't super focused on the size part of it.