Nevill's Destiny

Nevill has this great moment in this chapter where he stands up to the trio. But what's interesting is that they've created this monster, right? Harry and ran and hermione have been super supportive of nevill. And then nevill is using that confidence against them. So it just questions for me, this idea of destiny, that maybe we have many destinies, but we can only fulfil one. If nevill had been therei it just seemed to me like an illustration of a destiny that wasn't fulfilled.