IF sight stone was not just a support item how come it only gives hp and no other stat??? 
How come sight stone builds out of only support items??? 
how come only 100 percent of pro players build sightstone when they play the role called SUPPORT
look if ur playing support and want to build damage that is perfectly fine. Just buy a damn SIGHT STONE
Correction, 
and build out of .
Clearly you've never played support and have no room to argue about support items.
NALCS just had a jungler with a Ruby Sightstone.
Your argument is invalid.
Sightstone is team item. Not support item. Dont buy it if you wont use it fully. I prefer support building damage if they arent used to using SS.
Sightstone doesn't build out of support items.... wtf. Only the variant tier 2 items do. Don't be silly and make stuff up to justify yourself.
Fun Fact : Before the warding jungle item happened, Lee Sin built Sightstone as a must-have item. Last I checked Lee Sin was a jungler, not a support.
Because they're supporting the team with vision since they're not expected to build damage items. BTW trackers knife exists for junglers who want the extra vision
I remember when Jax and Lee used to build Sightstone in order to have on demand jumps.
You're mistaking an emergent property with an objective, universal truth. The existence of a "support" role and its nature are not fixed properties. It so happens that the most effective strategy in high-level play includes a low-income utility champion who doesn't suffer unduly from purchasing a Sightstone. In low-tier play, for example, a high-damage bully support that allows bot lane to snowball might be a better choice. The support player is making tactical choices about how to optimize his or her champion's unique kit, the same as you.
Because only supports have tools that don't require ap/ad to funcrion.
My only issue with SS sometimes is buying it delays some Enchanter or Mage's damage building too much early game. By getting things like Sheen, upgrading gold income to max first, or rushing Morellos (against, say, a Soraka), we can get a heavy advantage for the lane we sacrifice/delay by getting Sightstone first. Still need it at some point, maybe just not first.
