It doesn't matter if there are or aren't.
All portal fantasies essentially have the same plot, yet that's its own subgenre. All romances have more or less the same plot and that's a whole entire genre. So yes, all chosen one stories involve either fulfilling or preventing destiny; nothing wrong with that.
A story need not be limited or solely defined by its building blocks, any more than an individual human need be defined solely on their skeleton. There is scope for people to be individual, despite everyone having the same basic bone structure; same for stories.
All portal fantasies essentially have the same plot, yet that's its own subgenre. All romances have more or less the same plot and that's a whole entire genre. So yes, all chosen one stories involve either fulfilling or preventing destiny; nothing wrong with that.
A story need not be limited or solely defined by its building blocks, any more than an individual human need be defined solely on their skeleton. There is scope for people to be individual, despite everyone having the same basic bone structure; same for stories.