No, that's not how this works. You tell me why it can't or shouldn't be automated.
"Design an automated ATC system" isn't a valid answer to "Why can't ATC be automated?"
You: why don't we have a universal cancer vaccine?
Me: [ insert specific example of currently intractable problem ]
You: sounds like an excuse
Me: okay... can you explain how it could work?
You: THAT'S NOT HOW THIS WORKS
okay
Er, I sort of do think that's how it works? The ultimate rebuttal to "you can't do X" is to actually do X. Until you do that I think that ultimately the burden of proof falls on you. It can be very easy to imagine certain tasks and systems can be automated - especially when you aren't actively involved in those tasks and systems and are unfamiliar with their intricacies.