Anyone who things we don't share common ancestors with apes should really visit a playground. I'm terrified at what my godchild and other children her age consider fun climbing heights, speeds... and drops.
I’m amazed as an adult that that thing was allowed but it was pretty fun at the time and I’d guess not actually that dangerous.
I was curious and looked it up. In Germany climbing structures may have a "fall height" of up to 3 meters. They can be much higher, though, since the fall height is only counted to the next rope layer. Basically, the ropes will slow down your fall is safe enough.
Later on that day, a girl from their family was climbing on a low branch (maybe 2m off the ground), fell, and seriously messed up her ankle or knee. She was on crutches for a while.
The boys and I must’ve been somewhere between 8 and 12 meters off the ground. In retrospect it’s one of the most dangerous things I’ve ever done, and I’ve done multi-pitch trad climbing.