Why i wasted so much time learning to be a support?

I like supporting my team mates and i have dedicated a lot of my time on different supports to see which one fits my play style. For me it was always about either choosing soraka or janna as a support because they are forgiving of the ADC's mistakes.

So Soraka appealed to me the most in terms of supporting my ADC to the fullest. Currently i have over 100k mastery points on Soraka which shows my dedication to this champ.. I played and tested her in custom with various builds. I have done various calculation on her to make sure i could use her as effectively as possible in different situations/matchups. I only played draft/blind pick because in ranked your risking too much to try out builds or to practice a champ. I can still say that i am a noob with Soraka and she is not a spam W heal bot when she has to sacrifice 10% of her max health per W.

As a Soraka you constantly have to think about your positioning and what makes it even harder is that if your team mates mess up their positioning, you then either watch them die or rush into the danger zone to help. This conflict between when and when not to save a particular ally in different situations and constant challenge of positioning myself to help my adc as much as possible really proved fun play for me and rather challenging.

Then i found out that an item called Executioner calling exists and it's ridiculously cheap and applies grievous wounds by physical attacks (which reduce healing by 40%). A wise soraka player will not spam heals and watch her own health diminish to 5% but with this item i feel like i am wasting so much of my max% health to heal so less provided that i don't do damage whatsoever if i go to the healing route. Also that if i get hurt in the process i automatically lose the amount of healing i can do to my team mates unlike an adc that can deal the same amount of damage with full or half life. I was now ready to start ranked but i am afraid that this particular item will be abused against me and i know this item counters mundo, vlad, aatrox and other champs but personally the 40% reduction in their lifesteal is a much smaller amount than 40% reduction in heals of soraka that cost 10% MAX health. Executioner calling can be abused in lane because it is 800g only and with Attk speed and mortal reminder the enemy adc will just make me kill myself by healing for no reason as it constantly applies grievous wounds on my allies. Morello on the other hand applies it under 35% health only.

I have had matches where i healed so less that i felt like it was 4v5. I am not sure how this item will make me want to play soraka more and currently she is a very balanced champ. I don't know how riot is helping people to play supports more because i feel like abusing champs like velkoz, brand, annie, lux and etc in bot lane now. Lets face it, these burst mage supports are more of support carries than pure supports so they are played alot more agressively than for example a janna or soraka main would. Then riot can nerf the mages for being broken but don't realize it's the utility supports that need more attention