I've seen a many games where camping occurs. Laners don't understand how powerful of an impact they can have by sacrificing a wave of gold not even XP. For instance, if the jungler camps top and we know this because you are warding.... (right?) .... If I already cleared my top side and no have access to his+ drag and bot lane ganks uncontested. The amount of impact that a laner can have by literrally doing nothing it would seem is immense.
Faker is not glorified and hyped because of his mechanics alone. MANY players have Fakers mechanics or even better. Fakers ability to absorb pressure and minimize it's effects is what makes him so good in lane. That's why when he fails to do so, he is heavily punished and his mechanics alone can't get him back into the game most the time.
Jungling is a team effort, if you are under the impression it's only the junglers job to jungle control obj and such then wouldn't it solely be the lanes jobs to take care of ganks/roams since thats "laning" stuff? Obviously not. Junglers help laners, laners should help Junglers.
By Zoning I'm assuming you mean controlling Dragon/baron or just the river. Again this is mostly the supports job after a certain point, but ultimately the teams job. for instance an early dragon take can be thwarted by a support planting a ward up the river and boom nullified for 3 min. Do that 3 times and a Support controlled the Dragon for the first 10 minutes of the game. Later on the Support sweeps and wards both pits. Of course though they need a tank or some kind of protection to make sure they don't get picked off or clear faster. "Team work"
Is jungling important? Yes. (not nearly as much now though.) but so are the other roles. Mid is by far the most impact role in the game. They can gank, invade, win lane, pressure, easily escape, get to lane fast, have double tower protection from dives list goes on. Junglers are also heavily influenced by mid lane as mid lanes are influenced by junglers. ADC is simply "insurance" and then Jungle, Support and top in what ever order you like.
I could go on, but wow this got long.