There's a whole list of 8 points over what constitute a cult.
I don't remember the whole thing, but it was something like : Cults don't let you leave. If you do leave, your family and friends who are still in the cult will not speak to you. Cults control you in details. They make sure you are tired at the end of the day, too tired to think for yourself. Cults make you dependent financially. Once you are that deep in, leaving means starting over economically.
There's more, but it is different from how most people experience mainstream religions (I mean there are pockets here and there that are very cultish, but really the religion as a whole is a different beast that just works differently than an actual cult).
And then y'all exported yer culture out to us via Hollywood.