Sure, by one definition of religion. By another, they're literally religions. But more to the point, they were meant as tongue-in-cheek examples that intentionally missed the mark, to avoid getting pulled too deep into the linguistics debate over something I'd already conceded is so commonplace in religion that positing it is reasonable.
But I digress. For unambiguous examples, Ethical Culture, Secular Humanistic Judaism, and Unitarian Universalism are organized religions with congregations, clergy, rituals, and legal recognition, and they require no magical thinking of any kind. Beyond those, traditions like Theravāda Buddhism, Jainism, and Confucianism can be and are practiced without any supernatural belief, even if their classical forms include things like rebirth or ancestor veneration.
You could argue the first group are just philosophies whose adherents happen to gather for ceremony and ritual. But that brings us right back to my first point, which is that the definition is contested.
If you want to use a definition of religion that requires belief in the supernatural, go for it. But that usage isn't universal, and your reply to zarkanian functionally forced your definition onto them. To me, that undermines the pursuit of truth and honest dialogue.