So this thread is super interesting to me because it reminds of the way people talk about myth tropes etc. If you've heard of Joseph Campbell? He analysed loads of world legends and boiled them down to basically following the exact same "formula(e)" - one, called "The Hero's Journey" even sounds a bit like the YouTube "story" that a lot of people seem to have (google: "Monomyth" for the full thing, it's fascinating to match stuff up).
I wonder whether it's something to do with how we tell stories - we learn certain structures to explain our lives, and I think that by highlighting moments of insecurity/hardship in their "Draw My Life" videos a lot of YouTubers do follow certain story-structures. It's not that they didn't experience them, or that there's a checklist of life events that make people good, but that when asked to reflect on their lives people tend to focus on events that fit specific existing structures.
Another point is that most YouTubers tend to be more creative, sensitive, and expressive people - that's what makes them good - and those traits also make an individual experience the same life events in a very different way. I think
@JeriKane 's WWE parallel is really true too - and also true of almost every person who is famous for their creativity or art - everybody's fighting their own battle.