No. Why the hell would near field signals with relatively low amplitude and, high frequency kill us with prolonged exposure? 6GHz is not microwave material and even then, you would need a bunch of tungsten walls and wave guides everywhere to get some energy out that would cause significant harm.
Also Li-Fi is a terrible solution because of:
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You would need a giant sphere of sensors for directional detection of devices
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Incredibly noise susceptible, such a dramatic frequency shift from what most cutting edge product level electronics can conduct today.
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That signal will still have to propagate through copper, so you would have to have a massive serdes and all the training circuitry for it.