OK, sure. But, I hope you're realizing that it's still not a big issue, at least not in the sense that it's the "worst thing ever to happen since the world was going to end in 2008."
I think the key to that graph is it takes the population density of those large cities and applies it to land area. The simple truth is there is just not enough land for all of us to live in suburbia.
Texas has 695,660,000 square meters according to https://en.wikipedia.org/wiki/Texas
If you accept that the average suburban land parcel is 100 square meters, then you have:
8,000,000,000 x 100 trying to fit into 695,660,000
It only works when you use city pop densities, not suburbia.
Discussion
I never said population size is an issue, but you're kidding yourself if you think cities aren't the way to go.
The Earth has 148,940,000,000 square meters, we are 8,000,000,000, the average suburban parcel would put us above Earth's total land surface area.