again, back to the point. they support by removing the threat from the battle field. more exactly, remove them from the battlefield and send them back to the fountain. Or they just remove half of the hp of a target so the carry can take the other half with a single autoattack. That happens with my AP Malphite when my damage just barely falls short of a 100-0, although for most part I get the kill when the target isn't at full hp.
That's no different from a Leona chain stunning the target or a Janna keeping the target away from the carry. And besides that, they do this while also being capable of minor peel/disruption/enchants. they are supporting, except in a way that is not commonly accepted by the community.
One might think a support isn't supposed to do damage, but damage can be a form of support. Else, why does every single champion in the game do some form of damage? There is not a single champion in the game that has no damaging ability, even the most supportish of supports like Soraka.
Lastly, as long as they help with the warding and ward clearing, peel when needed, have the attitude of a support, they will still be supports.
can be a support, if she plays like one and I'm sure you've seen games where
3/2/13 and
18/6/4 before