For all the money this system costs more than conventional off-the-shelf energy efficient bulbs, switches, and dimmers, you could hire a janitor's assistant to keep an eye out that the lights are off in the evening and turned on in the morning, and have a system that is maintainable with very little training, off-the-shelf replacement parts, and which will work for decades.

But the smart system they installed came with a contract that said it would be more efficient, show proof of green credentials, and that the responsibility for solving issues lies with the contractor, so in abstract business logic it made more sense.