Why were the trinket upgrade removed?

(And more importantly why are they still icons)
As a support main, it is frustrating to ward an entire area of the map, lose all my ward charges, then my team focuses somewhere else, and I need to back to get more wards. No one buys pinks because they either don't have space or have just enough for their buy (or they just "forget"). Sightstone on a jungler is rarely seen in SoloQ DynamicQ. There are probably more instances I can't think of, but you get the point.
Vision shouldn't be solely the supports job, it should be encouraged for everyone on the team. Sorry for the slight rage, but coming out of games where I put 50% of our wards up and buy every pink ward on the team is very irritating. I honestly can't see why there were removed.