70g for 400 hp. 400 hp at level 6 which is already stretching the level you should be when you start ganking, is enough for a good chunk of health.
Its 300 gold. 360 if you have SV which really, by the time you have that you don't need pots anymore.
Spending 70 gold per back deducts from the already poor gold income of a jungler.
If I go gank your lane, and we don't succeed in a kill, that is gold loss for me unless I heavily tax your lane to make up the difference in gold and exp.
Junglers are not laners.
In S4 a jungler was behind in gold/exp to a laner
In S5 pre-season, they are even further behind. There wasa 100 exp reduction, and the ability to clear camps was reduced unless you are udyr/warwck so less gold income.

Must not exist then.. Guess Wards are completely invincible!!
Didn't know you can only but 1 of
and that
could find every single ward you put down at once and had a short cooldown!
Nope.
It doesn't. But it gives you the chance. This whole game is based on being at the right spot at the right time, with proper coordination and team work. Which is what the game is all about!
This does not at all refute anything I said.
The higher ELO you go, the better people become at warding, defensively positioning themselves, freezing lanes etc etc.
Again, it is chance, and during that change you are missing out on a potential 60 gold guaranteed from a camp.
Demanding junglers hyper gank for YOUR benefit at the cost of their own is not teamplay.
At best, the gank fails and you put your opponent behind in CS, but it means nothing if your jungler is also behind.
Even with constant farming, a jungler will be at least 1 to 2 levels under a mid laner.
So your chances at a successful gank are lower than in s4.
Not anymore. I used to play it back in S3 mainly. But I stopped cause I wanted to play other lanes like Mid and Top.
Then perhaps you should go and do the new jungle sometime.