How big are the side effects of surgery and general anesthesia on people?

It just doesn't matter. Generally speaking, the impact of surgery on human body is generally greater than anesthesia.

The influence of anesthesia on human body is only temporary and reversible, and the so-called side effects are all accompanied by anesthesia. After the anesthesia disappears, it has no effect on the human body.

Short-term complications may occur after operation, such as postoperative nausea and vomiting, which are not entirely the cause of anesthesia, but the operation itself may also lead to these complications.