If Support is about Zoning then why not use an Aggressive champ / AP/ADC as Support?
I've been reading various posts online about Supports and the main thing that seems important is zoning.
So if that's the case why not use an aggressive ap or ad champion for Support. I understand that the Top Tier supports I'm seeing in worlds seem to be being picked due to CC. As an example Caitlyn. With her traps / net she can cause frustration in lane for the enemies. Cait could use support items for gp and could still get wards / trinket like a normal support. Instead of using her R as a finisher, she can use it to take the wind out of the sails for her enemy lanemates. It seems that having an ad supp would really help with pushing towers as well (more so than an AP Supp). There are items available from the shop that combine AD with MR / HP / Armor so the AD supp could still end up being relatively tanky instead of focusing AD.
Please and thanks, I'm curious in the responses / perspective