What are the consequences if, for some reason, the aim becomes not-so-precise?
The "receiver" is more-or-less a field "covered" by a spiderweb of bent coat-hanger wire. That doesn't block the sun, and making it huge (low power/sq. m) is quite cheap.
Since you don't want clouds/rain/fog to block the microwaves, the frequencies you use are ones which water does not absorb well. So if the beam hits a person...he probably can't even notice it.
It seems that practicality and efficiency concerns limit the beam at between 10% to 30% of the solar intensity. Every single design falls in that range.
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.
2) Beam can be used as a weapon if you will just point it and light it up and thus deploy would be sooner or later heavily restricted or outright banned like nuclear weapons in space are banned.
Unfortunately, most of these impossible proposals lack any form of passive failsafe. Plus, the insurance liability question maybe an unsurmountable unknown.