It might be to you but not to Muslims. It's part of our Deen. Evil eye, Jinn and Sihr are all part of the Unseen world which of course your kind like to mock and ridicule.
That's like saying 2+2 does not equal to 4 to some people. You're entitled to your opinion but not to facts. The truth matters.
Besides, this nonsense is not mere personal "opinion" or "believe." It actually kills people. Think of the black Albinos of East Africa which are currently being hunted into extinction all because some superstitious Africans believe that the body parts of Albinos make a killer magic potion. So, they literally hunt and kill Albinos to make their magic shitt.
The believe in superstitions is not only dangerous but also goes against all reason and knowledge. There's no scientific evidence that "the unseen" world exists. The only reason you believe it is because the ancients did. But the ancients didn't know any better.