Your thoughts on Evolution?

A lot of really improbable things happen all the time, just consider all the possibilities for what every single person in the world could be doing right now, yet they are doing exactly one specific thing.

Not sure what relevance that has to what you quoted.

I completely agree with the first clause, but the second is nonsensical.
Since your metaphor is lacking and vague, I'll create my own.
If you have a billion-sided die, it is improbable for it to land on any particular side, but, if you roll it, it has to land on a side.
You seem to be implying that landing on a side is, itself, remarkable; it's not.

So, back to your example, every single person in the world has to be "doing" something by virtue of their existence.
That doesn't say anything about the statistical likelihood of their doing a particular thing.