I used to "suck" at soldering, until one day I was recommended a Louis Rossmann video by Youtube and decided to watch it. Once I saw how much flux he used, I started to use more flux and as it turns out, that was my problem. That is my problem with this article. Flux is only superficially in a sentence. So my tip to beginners: Cleaning flux is way easier than struggling to solder with little/no flux.
learning that way will also have you relying on flux for through-holes, though. you can get really good without flux, just takes some tip cleaner and a brass cleaning pad, and you'll end up wasting less on the smd jobs
Is that really a problem, especially for a beginner? I can understand if you are soldering a lot, you will be faster without the need to constantly add flux and save resources but at that point, I think the repetition will let you get better over time anyway.