Yes the safety is absurdly bad
https://wikipedia.org/wiki/Space-based_solar_power#Safety
And Wikipedia is only talking about humans, not about electronics, which are much more sensitive to microwaves. Want to fry the enemy's electronics? Just focus that "civilian" microwave transmitter with a few GW power tightly on where you want it to be.
I am really surprised nobody talks about this whenver space-based power transmission is mentioned.