Why is an Item which only counterplay is vision, also the best way in the game to destroy vision?

Honestly, it makes no sense.

You get bonus dmg for not being seen. Thats good and I actually like it. It would make warding so much more important and would even reward offensive warding.

So why the hell does it also need a build in to by itself counter its own counter?

This trend that one Item has to do everything is really going too far.