The main difference is that our optical spectrum (880 nm) is almost noise-free. Radio systems suffer from interference with other signals, other WiFi networks and devices. The radio frequencies most commonly used are the 868MHz and 2,4GHz bands, which are extremely crowded. A transmission that works the first time might be disrupted next time.
The radio frequency pollution will not go away in the future – it will actually become even worse. Optical wireless communication is therefore more stable, more reliable, more robust and more future-proof.