Have you ever wondered if AI could build an entire website for you? A budding developer recently conducted an intriguing experiment. Wanting to create a simple WordPress site about classic PC games, they asked an AI to build a custom theme from scratch instead of hand-coding it. The initial results were astonishing: the site scored a perfect 100/100 on Lighthouse performance tests for both mobile and desktop. It seemed as though the AI had done a flawless job. However, after making a few small content edits, something unexpected happened. The mobile performance score dropped to 89, while the desktop score remained a pristine 100. Herein lies the catch: the AI demonstrated a 'naive' understanding of crucial details. It turned out the AI assumed the first image tag in the site's HTML source code was the main or 'hero' image that needed to load first, regardless of whether it was immediately visible to users browsing on mobile. In reality, this image – a screenshot from 'Aladdin' – was buried deep below the main content (a massive table of PC games) when viewed on a small phone screen. What this means for you is that your phone was trying to load an unnecessary image too early, slowing down the page load specifically for mobile users. Meanwhile, fast desktop connections easily masked this delay. The fix was simple—a minor adjustment to a single image attribute—but the story reveals a critical point: even seemingly flawless AI-generated code still needs a trained human eye. We humans understand user context and how they interact with content, something AI still struggles with. So, the next time you're considering using AI for a development project, remember that human review remains invaluable for ensuring optimal performance and user experience.