Ah, the famous "pot calling the kettle black" argument. How cute.
It's not about that. It's about the democratic process becoming ever-more transparent, because of the free flow of information on the internet. You can't protect "trade secrets" as a politician like you once did. Any transactions you had, with members of the media or foreign countries, are eventually going to be found out.
Once your stuff is out there, it can be accessed. And in all likelihood, it will be. Especially if your protection sucks, as it did in the case of Democrats.
Clinging onto the idea that we can have elections with the politicians' private information being completely protected, is useless. You're going to be an open book, whether you like it or not. The politicians are going to have to adapt to that, and the people will have to, as well. It's not as if Trump didn't have a bunch of stuff being leaked out, over the course of the election, some far more harmful than the DNC leaks.
We can't pretend to get outraged over minor stuff anymore because everyone, from now on, is going to have all of their "dirt" out there. The problem is not that the information is becoming available, but how childishly people react to the information, as if they've uncovered a grand conspiracy.
That politics is a dirty game, shouldn't come off as a surprise to anyone, at this point.