There is not a single word, or even hint of a word, about "chosen" in that statement. Happenstance is not choice.

I once dealt a poker hand of four ace-high royal flushes. The players thought I was playing a trick and they made me re-deal. The second time every hand was four of a kind, all face cards. The players stalked off in disgust. I did have a reputation as a trickster but in that case both were fair deals, though as dealer I’m the only one who knows that.

Every card is unique, so the odds of any particular hand is the same as any other hand. Yet those high hands are the ones that count most and are highly desired. Statistically such an event should not have happened in the duration since the Big Bang. It is an eerie thing that used to give me shivers.

Finally though it was laid bare and neatly explained by one of my daughters: It was nothing more than the work of a mischievous ghost who happened to be on the premises. There are simple explanations for everything if only we apply logic and critical thinking.

The universe is way more complicated the A>B>C...X>Y>Z, In reality it isn't a line its more like a river, that is to say you can move forward but not backwards, but you can also move left-forward and right-forward, changing the stream you are in. Modern physics tells us that some events, and especially quantum events truly are random in nature and fundamentally unpredictable, with the macroscopic deterministic effects emanating from those random laws a matter of probabilities at large scale. These effects can have macroscopic effects.

For example, lets say you make a decision based on some quantum experiment. Lets say you make a list of what you want to eat, pick a random number based on that number, then ate lunch. under the many worlds interpretation of quantum mechanics there are other universes that are inaccessible to ours where the you ate something different for lunch. If you did this every day for a year, in some universes you would eat the same thing every day, but in most you would have a variety.

What this means is that you are not the "chosen one" but rather the most typical, most likely you that could exist, but tiny fluctuations could make you the most unique.

Each one of us is the product of the 1 in 100,000,000 sperm that was lucky enough to fertilize the egg, so we are all lottery winners, otherwise we would not be here.

I don't think anything has any inherent purpose, other than what we choose to ascribe to it.