> we should just be labeling it accurately to avoid becoming confused about what we are doing.

I think you are doing quite the opposite, and your overexpansion of the term obfuscates things rather than clarifies them. As another user wrote, there is a perfectly good word that covers all your points: ideology.

And that way you don't get the side effect of claiming that cultural food preferences are religion, since they also can't be scientifically validated.