Because it should be possible for 2 articles to cancel each other out with a loud bang and release of excessive energy. For example:
Inside Internet Archive
The right to be forgotten is an assault on freedom
So 'we' applaud the efforts of a team making sure that no-one can drop stuff down a memory hole to be forgotten, and we applaud governments for fighting for our rights to have dumb stuff we do deleted from the internet.
It's contradiction at its finest.
Of course we don't want our politicians and celebrities faux pas to be forgotten, but in that case why should we expect to cover our own backsides? Does this only work if you have the 'right' perspective, and because you know that you're innocent? Or does this only apply to search engines, and the guys running the internet archive are not making money off their public product and are therefore in the clear.
Quite curious really.