I think this is closest to correct. If the metric is that cult members are kind of duped to go along with group think and philosophy is the practice of questioning belief and thought processes.

That positions philosophy as the meta-analysis end of the scale and cults as the automatic.

So, this is definitely a playground for kids, but seeing as a fair few people mentioned playgrounds big enough for adults…

This one in Australia is accomodating enough for adults, many parents in there all the time

https://brisbanekids.com.au/bradbury-park-kedron/

Would kind of love this