Flyingmac, that was not necessarily kind. But i do see your point. Half the posts here refrain from answering the oP's question, and half the others don't really help much.
So, back to basics. Why do low level circuit?
Answer: Sometimes we or the forecaster get it wrong. So. It means it will be generally preferable to land rather than crash, and in order to achieve this, we may need to fly lower than usual. Under control....As in, the pilot decides what happens next.
Which means getting used to the visibility under cloud, which may be less than optimal, and the sensation of ground references rushing by at low level.
That's why it's in the syllabus. And a couple of circuits on a nice sunny day at 500 ft might tick the box but won't, as I'm sure you know improve anyone's chance of survival