I haven’t done the math or really thought about it all that much but one reason could be that space has a lot of, well, space. You can build a huge array withou

I haven’t done the math or really thought about it all that much but one reason could be that space has a lot of, well, space. You can build a huge array without wasting land that could be used for something else, condense the power down to a beam and send it to earth.