While undoubtably true, one of the big issues with our currently changing climate is that the anthropogenic forcing is supposedly pushing change faster than historical 'natural' climate change. Thus, ecologies will have less time to adjust and that is generally considered to be a Bad Thing. The problem with that theory is that some of the finer grained climate studies - mostly from newer ocean sediment cores - indicates that some significant changes have happened over periods of decades. That clearly is putting increased stress on some critter populations and, in fact, entire enviroments but sometimes life is a bitch.
From a purely practical, selfish standpoint having significant changes in climate (and therefore resources and therefore economies) is going to put even more stress on H. sapiens sapiens so we will tend to screw things up more than ever. Might very well suck to be us in a couple of decades. And this is irrespective of whose 'fault' it is. Remember, the current period - the Holocene - has been characterized by very stable weather patterns. This is not normal and probably won't stay stable - again, no matter if it's caused by a volcano or big coal.
As to whether or not we can actually influence things by cutting down on carbon consumption - that is a completely open question. There are lots of good arguments to make about not using up all of the planet's resources in 200 or so years and mitigating our species impact on the rest of the planet. But that is very much a philosophical argument.