Plato was famous, but only one of the many voices in very long debate. Whatever people were thinking 2000+ years ago, it had already lost its influence by the time of AI's societal debut in the 1980s and is totally irrelevant to AI's impact today. While both may share a mindset, linking Plato to today's techno-bros is a bit of a stretch.
The allegory of the cave still has resonance today. Abstract ideas are timeless. That's the point of abstraction.