[xenadu02]

That doesn't mean conditions will be to our liking under those regimes. We built cities along coasts assuming a certain mean sea level. We built farms assuming certain weather patterns.

If we cause large changes to these patterns in a relatively short period of time that's bad. The long-term trends you are talking about happened very slowly - slowly enough in theory a city could move back from the shoreline without anyone noticing it was happening. Slowly enough that species can migrate or adapt to them - slow enough natural selection can produce individuals more heat or cold adapted.

Climate change isn't going to cause humans to go extinct or anything like that. But it is going to have large and sometimes unpredictable effects, most of which are not useful or helpful to us. Many of which are actively detrimental.

Since the oil/coal/natgas will eventually run out anyway and the world so depends on them that gives leverage to people who really really want to hurt us: we might as well just deal with it and move away from burning things as much as possible.