If I might ask, how so? The point I'm trying to make isn't about how many wards you can place, I've already admitted I was wrong, but that still brings to the table, what about the Lens? Even if you still get the lens and no SS and leave warding to everyone else on your team you'll still be at a disadvantage to a team that sacrifices their 6th support item for a SS.
Otherwise you're suggesting not getting a lens at all, but still if the enemy gets a lens themselves, they can deal with your wards while you have no way of dealing with theirs, allowing them more control over who has vision on the map then you do.
So my point DOES still stand with the Sightstone giving more of an advantage then you are giving it credit for.