But the net is hugely negative. 1/3 of the world's people are close enough to a coast that they will have to do something when sea levels rise.
So why don't people move now before they're underwater? Put another way - have all the people who are proclaiming coming disaster started moving their assets away from the coasts? Why are we focusing on emissions rather than moving people now? Surely moving people is cheaper (and more direct - that is, localized) than trying to control emissions. Such a thing would avoid depending on other people to fix their behaviors - it would also guarantee an outcome, rather than a probabilistic estimate of what happens if we curb emission X.
People must really place a huge time preference on things to delay moving in spite of the proposed huge future costs. Or, they just don't believe it... or the "speed" of things isn't really as fast enough for people to care.
Climate Change is happening too fast for much life to cope. The speed of the change is all negative.
This is both defeatist and probably more political than technical. If political will is high enough, humans can do crazy things in short (e.g., decade-span) timeframes, especially when we don't have to invent anything but just have to move people inland or build hydroponics or desalination plants etc. It's all political, not technical. If we want to reduce the cost of sea level rise, why not tax people closer to the coast, and reduce tax away from the coast? Rhetoric talks, but money walks. And hitting the individual harder (rather than corporations) will motivate people much faster than not. Hell if you think the future disaster is high enough, you should ask your governments to build everyone living within X of a coast a brand new house inland and giving it to them (and personally be willing to be taxed for it), because that will cost less than the future cost of disaster mitigation later.
I guess, at the end of the day, the focus is too one-sided on emissions, rather than on relocation or adaptability. I know if I lived close to a coast, I would move inland rather than rely on some disparate group of companies and nations to reduce their emissions which will maybe prevent my land from eroding away or getting hit with bad weather in my or my child's lifetime.
I would rather put in policies to avoid turning inland (midwest US for instance) farmland into subdivisions - I hate to see our local farmland turning into cookie-cutter homes; reducing farmland seems to make us more sensitive, not more robust.
So that's what I mean by too narrow focus, in tech, in media, etc - everyone is focused on emissions, not on adaptation. If we don't adapt, we die - trying to refuse to adapt is actually worse in my mind.