In this case we have at least two problems, energy and climate, and many causes and effects. Carbon dioxide is the most prevalent climate-changing gas, but not the only one. Climate change is a major side effect of fossil fuel burning, but not the only one. We can't begin to sequester every carbon dioxide molecule coming from burning coal, oil, and gas, but even if we could, we would still have oil spills, acid rain, urban smog, messed up aquifers, strip mines, Middle East security worries, depletion, and all the other headaches associated with nonrenewable, unevenly located, sloppy fossil fuels. The good is the enemy of the best.
Carbon sequestration is only good.
The best energy technologies are those that give us light, heat, or motion using much less energy. Efficient light bulbs and appliances. Next best, especially after we've reduced energy use through efficiency, are technologies that tap renewable sources. Not completely benign by any means, but much more so than the options farther down the list. Next would be natural gas, especially if combined with carbon sequestration, which does not need to take place in deep earth or deep water.