Current state of supports

You ban soraka, Enemy picks Janna,Taric or Sona,

you ban janna, enemy picks taric, sona or soraka

you ban taric, enemy picks sona soraka or janna

you ban sona, enemy picks soraka jana or taric

whats the common theme of these supports that are p/b in solo queue. at least my low elo of plat 2. HEALING!!!!! and ardent censor

PS. forgot to mention lulu. but you get the point. this is pretty much every damn game