If you are, why may I not presume you're comfortable talking to a robot assistant?
If the experience of talking to the robot is noticeably degraded from the experience of talking to a human, that's a different question entirely---I'm assuming they're equivalent, maybe I should not. But if they are equivalent, what is the difference to the business owner?
(And FWIW, I think the drones would likely drive or walk in; look for Segway or Boston Dynamics to come up with something in the not too distant future ;) )
For me, the core question is who gets to make that assumption, not whether it's correct or not. The people who are most impacted by uncertainty should have a choice about participating IMO.
But, one thing I'm realizing from other threads is that some people feel they have a similar level of uncertainty for human interaction, and are frustrated by the status quo of needing to interact with services. For me, that says this tech clearly has a place -- it just needs some effort to proactively establish etiquette around it's use.
Maybe we disagree about whether opening a phone line is opting into be called by a robot. I don't think almost any restaurant thinks of it that way, and if they did then it wouldn't be necessary to fake human vocal inflections when you call them.
The view you're expressing is what reminds me of telemarketing -- it's a presumption that the fact I open up a channel means I've authorized you to do anything you want with it.
Regarding your parking lot analogy, I think we're going to have exactly these arguments about usage of public space. Will stores with counters be ok with Drones flying in to stand in line? Stay tuned!