How Mirrors Could Solve our Energy Problem

Here's my thing about concentrated solar:
Look at the infrastructure needed. That's quite a bit!! And it's fairly complex as well. Photovoltaics just "are."
Also, what about the efficiency? Surely it's more efficient to create electricity directly from the sun (photovoltaics) than it is to first use the sun to heat water to turn it into saturated steam which then drives a huge mechanical device -- which, mind you, requires lubricants that come from petroleum products.
That's several steps from sun to electricity there. And efficiency is lost at every step. Also, WAY more expensive.
What bonuses does it have to outweigh the negatives? I'm not seeing it.