They'd have similar arguments. And I mean, they wouldn't be wrong: we're wasteful; we duplicate effort; things are scattershot and disorganized.
But we live in an amazing world of progress, creative expression, and wealth, too.
Imagine taking another small step in the direction towards developing and exploiting human talent and allowing for self-actualization.
That was what I was getting at in my previous post: having everyone at peak potential is great when everyone is aligned. If there is internal strife, peak potential just means bigger conflicts. Taken to the extreme, that means bigger wars and billions of dead people. Until we can figure out the coordination problem, human limitations are not the biggest problem IMO.
My counterpoint is that even without people being aligned, we're far outperforming the past and what people hundreds of years ago thought we might do with increased privilege. Indeed, we even have less strife overall, even if we have many more axes of disagreement and fewer shared values.