You are right, that's exactly my point. I was in such situation multiple times. People will say "it's impossible" but they actually mean "it's impossible given my motivation connected to money, time I could be given, freedom to experiment without boss looking at the calendar, and probably a bunch of other things". When the same people are given sudden motivation kick (even as a hypothetical) they start to actually think. Maybe they'll figure out that it's impossible anyway and won't do it for a $100M. Myself, I'd immediately start to think how to do it.
That's a joke. but unironically you could manage 1000 Kubernetes clusters with automation. why not?