Can't we say "It's not brain surgery" instead?

我们能不能用“有什么啊，又不是脑颅手术！”

youdao

Even if you are willing to ignore the legal issues, this process, while not brain surgery, takes more skill than the average user possesses.

即使不考虑法律问题，在Windows电脑上安装苹果操作系统虽然不像脑外科手术那么复杂，但需要的技巧也比普通用户所掌握的更多。

youdao

Apparently the stroke and the brain surgery affected the "not being an artist" part of Sarkin's brain, because after he left the hospital, the man became obsessed with drawing.

显然，中风和脑部手术影响了萨金大脑中“不当艺术家”的部分，因为他出院后就迷上了绘画。

youdao

Although I could feel the surgery, it did not hurt, as the brain feels no pain.

CNN: 'I had brain surgery while I was awake'

He said doctors told him that if he had not gotten to the hospital and had emergency surgery to relieve pressure on his brain he might have died that night, according to the arrest affidavit, which says he suffered a skull fracture and a brain hemorrhage.

WSJ: Cops: Witness IDs Giants owner's nephew in assault