Script is restricted, but it permits everything outlined by Nick Szabo's definition. As Wikipedia notes:
> Smart contracts were first proposed in the early 1990s by Nick Szabo, who coined the term, using it to refer to "a set of promises, specified in digital form, including protocols within which the parties perform on these promises".
https://en.wikipedia.org/wiki/Smart_contract
We don't get to decide what smart contracts are. Nick Szabo decided long ago.
Marketing vs reality has been a big problem in this space.