I fail to understand how a random "special government employee" dumping sensitive government data into a flashdrive and trying to share it with private corporate is not a big deal?

It is not a big deal as it doesn't affect the average American like what may be implied. Our data already has been leaked and stolen before this. So this is smaller issue of a government employee breaking the rules.

You are focusing on "what" was leaked, and not "how" and "why"

In this context it doesn't matter how or why. It's the reality we have to live with going forward.