[{quoted}](name=Blue Shift,realm=NA,application-id=3ErqAdtq,discussion-id=EEiVJbYd,comment-id=0003,timestamp=2019-11-24T15:54:45.983+0000)
The reason has always been that pink wards were counters to stealth champions, and always having a slot dedicated to fucking over those champions would be extremely shitty to play against.
It's a little different now, but still relatively the same. Imagine playing Shaco and every enemy in the game now has a dedicated slot to just fucking you over.
Teemo is another good example.
There are only 5 champions who are revealed by Control Wards during their stealth. However, it should be noted that these champions are also visible if you are close to them, without needing a Control Ward. They are:
(Passive after Level 6)
(W)
(R)
(Q)
(E)
Also, while Camouflage can be revealed both by Control Wards and by standing near the stealthed champion, Camouflage also usually lasts longer than Invisibility. The shortest Camouflage in the game is Pyke's, at 5 seconds, during which he ALSO get's a huge Movement Speed boost, meaning he can still gap close quickly anyway. The longest, if you can even count it, is Evelynn, who can theoretically stay in Camouflage the entire game after she hits level 6. Comparatively, the shortest Invisibility in the game is Kai'sa's, as it lasts only half a second. The longest is Teemo's, which like Evelynn's, could theoretically last the entire game, though that would make for a very useless Teemo.
The only thing Control Wards actually do against Camouflaged champions is make it so that they can't just run through any path they like as much as they want to get to a target unseen 100% of the time. They have to, you know, actually worry about the possibility of getting caught out themselves. Essentially, if your team puts control wards at all of the riverside jungle entrances on your side of the map, then a champion like REngar or Evelynn can't just waltz into your jungle with zero risk and go kill the ADC farming a side lane in what should be a safe location. They would first need to kill the control ward, or else hope that the ADC and their team aren't paying attention.
So, basically, no champions get "fucked over" by Control Wards. If you become Invisible, they don't reveal you, if you become Camouflaged, enemy champions can see you just by being near you, so using a Camouflage ability when you're right in front of someone doesn't really do anything anyway.
In essence, you are right that OLD Pink Wards were massive counters to stealth champions back in the day. But that's just not the case anymore, since most stealth champions aren't revealed by Control Wards, and those that are revealed by them would be revealed by close proximity to an enemy champion anyway, with the Control Wards really just serving to prevent them from getting too much of an advantage from their longer lasting stealth.