Sorry for the late reply.
I have a very different take on the "why use presets" than the valid technical reasons sighted already. For every scene I light, I think about time of day, mood, what's happening in the scene, overall style of the project, etc. And in the process of coming up with the lighting plan, I almost always decide to add a little or a lot of gel to one or multiple lights. And frequently I will have different color temperature lights working different aspects of the scene (key light vs. shadow, or beside lamp vs moonlit window as examples). When I use presents, it is very simple for me to know exactly what gel to call for on which light, and -know- how that will look in post. To me thats critical when working fast in the 11th hour. I suppose some might say that is being lazy, but it works for me and I usually send to post the image I want to send.
So point being that T & D end up being my two baselines from which I work the lighting plan.