What is the philosophy behind Sweeping Lens if its role as a "ward killer" is so poor?
Whenever I use Sweeping Lens as a jungler, it is never enough to counter mass enemy wards. You kill one, another takes its place 5 seconds later. You try to sweep for one in an uncertain location, it's probably in another spot. And even if you swept 3 wards at once, you're already caught and can't gank. And 3 more will just appear 2 seconds later.
It seems to me like Riot never meant for Sweeper to be able to compete with warding. Merely inconvenience it. I view that as too favorable for the defenders. Just grab a pack of wards or a Sightstone and a jungler can't touch you in lane unless it's Evelynn.
Can we get some insight as to why this so?