Amid the Chinese spy balloon saga, calls have grown louder in Washington, DC to ban TikTok, the huge social-media app owned by the Chinese firm ByteDance. It’s self-defeating opportunism that defies logic and showcases America’s own risk to itself. Republican senators Josh Hawley of Missouri and Ken Buck of Colorado recently introduced a bill to ban the video-sharing app in the United States, arguing that it’s a national-security threat. They and others claim that China’s communist government could abuse the data collected on 94 million Americans who use the app or rig the platform’s algorithms to favor Chinese propaganda. Congress...