Why aren’t witches punished now?

Exodus 22:18 says: Thou shalt not suffer a witch to live.

There are many many instances of witches or “witches” being burned or drowned or any manner of things. There are also many many self-proclaimed and suspected witches touting it. Why aren’t these people brought before a priest or authority figure?

I don’t mean to murder them, that’s barbaric. But if churches were given such power as to punish witchcraft, as it seems they may come close to now, should those who practice it face judgment in this life?