Without commenting on this topic in general, you appear to have a flaw in your reasoning. That a restaurant was added to Doordash does not prove that it never had the ability to deliver before that.
It doesn’t guarantee that they never had the ability to deliver. But the fact that delivery apps grew (kept adding more restaurants so quickly) was in part that restaurants could do delivery when previously they didn’t. The parent‘s argument was that delivery was already a norm before, which clearly was not the case.
And I also point to restaurants that are newly added to delivery platforms, because you can easily verify if they previously could deliver or not.
