What does it mean for someone to "join narratives to explain their experiences"? Describing the Blue Whale Challenge, an online phenomenon where participants perform tasks with the final task being suicide, we have the following:

Dr Achal Bhagat, a psychiatrist in Delhi, told the BBC he had not encountered a single Blue Whale case, although he speaks to young people every day.
&quot;People join narratives to explain their experiences,&quot; said Dr Bhagat, adding that is possibly why some children have said they participated in the rumoured challenge despite there being no proof of its existence.
Aparna Alluri, Why is 'Blue Whale' hysteria gripping India?, BBC News, Delhi, 2017

I don't understand what &quot;people join narratives to explain their experiences&quot; means, and how its relevant to the context.  It seems to imply that people are making up they've participated in a Blue Whale Challenge (i.e., they join the narrative) because of some (unstated) events in their lives.  The quote also indicates it holds more generally, i.e., it's not only true for the Blue Whale Challenge.
Question: What does it mean for someone to &quot;join narratives to explain their experiences&quot;?
I think there is nothing formal psychiatry or psychology related about the psychiatrist's use of language when saying 'people join narratives to explain their experiences'. What he is saying is that people tend to link causally various narratives/stories they have heard of to generate an explanation without much evidence of there being an actual causal link. The joined up narratives then make an appealing sense of things having been explained. 

The reason why explanations are appealing is clear upon reading https://en.wikipedia.org/wiki/Blue_Whale_(game) - there is a very disturbing event - suicide by young people, then there is something of an explanation which seems to make some sense.

See also:

Causal relatedness and importance of story events; Tom Trabasso, Linda L Sperry
Journal of Memory and Language: Volume 24, Issue 5, October 1985, Pages 595-611
https://doi.org/10.1016/0749-596X(85)90048-8