> Humans have experienced 120m sea level rise since the last ice age.

Human civilization didn’t, because human civilization didn’t exist at the last glacial maximum, and almost all of that rise was before human civilization existed. Low density nomadic hunter-gatherer existence is less disrupted by sea level change than settled agriculture and industry.

It's not about the survival of Humanity, but rather about global trade disruptions, mass-migrations, and massive property damage on a scale we've never seen. Humanity will be fine, but if it goes really bad then it will cause a lot of suffering and it may take centuries to recover.

While that's true, we didn't have as many major centers with permanent buildings set up. I'm looking for data, but I imagine that places like New York would be underwater, would they not?