You make a great point. Personally, I'm Christian. And I've seen a surge in interest within Christianity (online, at least) concerning many of those topics. Maybe not with the end in mind; Christians aren't trying to learn witchcraft to practice it, but stronger attention is now paid to the sections in the Bible that mention astrology, other types of beings, the spiritual realm, and alternate dimensions.
Whatever your inclination, I recommend listening to Timothy Alberino and Michael Heiser.
The article doesn't mention what might be the primary driver causing people to reject organized religion: increased exposure to people from different backgrounds.
When a child is brought up in a devoutly religious family, where their entire world is populated by siblings, cousins, aunts and uncles, teachers, friends and acquaintances all with a similar belief system, it will be rare for that child to reject all of that.
The child is like a fish that doesn't know what water is because it doesn't have an alternate point of reference. The child may never deeply interrogate their beliefs, or consider whether they should choose a different belief system.
Its a rare culturally insulated child who will manage to seriously consider other belief systems, and even then they will find it incredibly difficult to switch, since that would sever many of their social connections and support systems.
Generations of increasing urbanization mixed people of different backgrounds together. The internet and social media have only accelerated the mixing and exposure to a wide variety of cultures and beliefs.
When a person understands, accepts and befriends others from different backgrounds, it can get pretty difficult to continue believing that the religion of your childhood is the one true religion.
Whatever your inclination, I recommend listening to Timothy Alberino and Michael Heiser.