Vibe coding has compressed the distance between an idea and a runnable application. Natural-language instructions can now produce SwiftUI screens, networking code, persistence, authentication flows, and deployment configuration with very little manual typing. That acceleration changes the bottleneck rather than removing it. A build that launches successfully is not evidence that the application handles hostile inputs, unreliable networks, concurrency boundaries, credential storage, production failures, or future changes safely. Recent research makes the distinction concrete. A June 2026 preprint studying 200 deployed applications sampled from 10,517 open-source vibe-coded projects reported 1,471 manually validated vulnerabilities, including broken access control, cryptographic failures, injection, and secret exposure. A separate 2025 benchmark found a large gap between functional correctness and security in agent-generated solutions. These studies are not specific to iOS, but they reinforce a useful engineering principle that generated code still requires independent verification.