Why so overengineered? Am I missing something?

[ursusursus]

I get this is a demo but why not simply use the Future builder?

func TaskPublisher<T>(closure: () async throws -> T)  -> AnyPublisher<T, Error> {
    Deferred {
        Future { emitter in
            Task {
                do {
                    let result = try await closure()
                    emitter(success(result))
                } catch {
                    emitter(error(error))
                }
            }
        }
    }
}

am I missing something?