So what's the big deal?

So what does the ability to arbitrarily break and form bonds imply?

Assuming that the technology to break and form bonds in Lego-fashion is fully formed, the human society will move to a post-scarce society literally overnight. Now, there are some people who argue that even with a post-scarce society in place we will still not be "happy", whatever that word means. But I think that we could all agree that without a certain level of material abundance (i.e. in certain parts of the world such as Africa), no forms of "happiness" could ever be attained.