I'm a fairly new player and not even in ELO yet, so maybe this doesn't qualify to get a response,but;
I understand your point of view on Support Champs (in the OP). I fully get, why you'd say that the impact a support has on a game before a certain 'skill level' is less than they would have in higher regions.
That said, everyone in the game, wants to be 'the' APC or ADC. This creates an imbalance, obviously, so what would you suggest the players to do, when you look at it from a broader perspective?
Your advice would work if you would advice players to take up a certain AP/ADC champion in a single player game. Since that is not the case and all spots need to be filled, a support is a 100% mandatory in any level of play. Perhaps you've been in the higher regions of ELO too long, because even where I am, at level 23, we try to devide the playfield in solo top, jungler, solo mid and duo bottom, with one support that doesn't eat CS. And that's simply the core of the game.
Saying you don't need a support in low ELO, suggests that a support doesn't add much to the game, but what you seem to ignore completely is that no single carry can tank a game of 5. None of them can do that. So if you want to have a better shot at winning, you want to conform to how the game is/should be played.
When the ADC wins, the APC also wins, the jungle also wins and the support also wins. If having a support doesn't make you lose more games, which it obviously doesn't, you shouldn't argue that people *should* play an AD or APC to win. Instead, you should say In low ELO,a good carry makes more of a difference, so make sure your best players play ADC or APC. Don't pigeonhole people into one role, when only one person out of 5 can perform that role.
If I'd been you, I would have recommended playing what you feel best at. Because that's what this game is about. Learning a champion, mastering that champion and feeling good about that champion. All other things like experience and winning, will come automatically, no matter what role you play.
That response was quite a while ago, but even now I truly believe that a kill lane champion is much better off at lower elo compare to the general AD support lane.
Fun fact, back when before the current meta is popular, everyone at higher elo, including Chauster who was interviewed in one of the video, stated that double bruiser will always beat AD+ support lane.
Why is the current meta popular then? You may ask.
As a matter of fact, our current meta is consider the most STABLE and SAFE meta out of all. The evenly split of gold income and the distribution of offensive and defensive role make it really easy for people to pick up and form a team comp. Compare to the old AD mid meta which is a lot more risk and rewarding, and roamer meta which much rely on a strong cc champion to go around the whole map, which often fail if they have no kills or assists.
Now, lets get back to the point, what is support doing that is needed in the current meta
Wards, Aura, and GP10
These 3 things can all be built on different champions, not limiting to the support. In fact, if you open up the gold flow, you can often allow people to get gp10 faster compare to the support. The downside, however, is that the carry will suffer from losing gold early game.
Wards can be evenly bought by everyone, Aura can be built on most bruiser/ jungler and few AP mid, and gp10....pretty sure bruiser, junglers, and even some ap mid can buy them.
My argument, is that even when you don't pick a pure support champion, you can use the support side of it. Sion has a stun. J4 has knock up and armor debuff, as well as armor buff and attack speed aura. These two champions might not consider as a traditional support, but nonetheless they have the ability to support and can both be built with GP10.
So my conclusion is that rather than playing a traditional support, you might be better off to go with a brusier with damage potential.