Comment by justonenote

Religion

It doesn't need need to be tied to some mystical god, "music is my religion" is a phrase that has been used and is understood easily, and you can replace music with many other nouns, games, science, family, dog grooming, whatever.

You can kind of see this in the rise of weird internet cults around celebrities and obviously many IRL cults over the years, and I don't know if the frequency of weird cults has increased in the last 3 decades but I would take wild guess and say it has.

"Make religions cool again" is a bit of a hard sell considering worldwide events but unless we can come up with a better word for a shared value system where people sacrifice things they can gain, for the good of the group, I don't think there is a stronger word.