Probably the correct answer. (I loved HyperCard as a kid and built a ton of stuff with it.) My only complaint about Decker as-is (last time I played with it) is that it has no ability out-of-the-box to make any kind of network connection to do anything. e.g. grabbing some data, triggering some webhook, etc. is all a no-go. Decker is completely self-contained and oblivious about the internet (a lot like HyperCard was).
Theoretically, it's possible to add network fetching to Decker, but it's an exercise left to the reader.
Leaving out networking feels very intentional in Decker, and if you start to go down that rabbit hole, I imagine it quickly devolves into all the pain and complexity of modern webdev.
(Would be happy if I'm wrong and happy to find out it's all there in Decker now.)
https://beyondloom.com/decker/