It's a perfectly correct term. They're smart because they do some computation, just like a smart speaker or smart phone. They're contracts because they're an agreement between parties. Not legal contracts, but neither are OOP contracts or social contracts or any other kinds of contract.
I guess I can see your point, but I think the usage of "smart" to describe consumer electronics with computational capabilities is a very different usage. Contracts are not "dumb" technologies that are being "enhanced" with computation; contracts and software code are already the same kind of thing. The difference is that contracts-as-code can actually execute contractual obligations rather than just describing them. I wouldn't describe this enhancement as "smart"... perhaps a better term would be "automatic" or "autonomous".
