Good luck convincing many people in the US of the same. I'm certainly not convinced. As you point out, Singapore has already abused the system. If some abuse is technically possible, it's probably already happening.
But there's a lot of room outside of "do nothing" and "omnipresent perfect surveillance" to do good things with civic technology, including non-pandemic stuff. Why aren't all public records online and searchable through a single engine? Or all forms editable and submittable? Or budgets and financial reports navigable or comparable? I'd love to be able to know how some random municipality is going to gouge me before I move there.
There's loads of room for good solutions for these and tons of other pain points. But as far as I can tell, American government is scared of letting go so the private sector can develop these things. And it's not imaginative or technically competent enough to want or develop this kind of stuff on its own. Or maybe it's not organized or unified enough?