That's right, and once you are 'winning' the rest is easy (just look up any word you don't know in the dictionary). But what if you aren't winning? What if you are taught not to figure out unfamiliar words because the same rules might not apply to all of them? I'll tell you what happens - you never learn the most important skill, how to read unfamiliar text by yourself.
You make it sound like Chinese isn't phonetic. In fact that's only half true.
Phonetic Components: The Secret Trick to Guessing the Pronunciation of Chinese Characters.
This (the article you quote) is true, but it's overstating the case.
Chinese characters often have a phonetic component. So 青,请,情,and 晴 and all pronounced "qing". The part on the right tells you the sound the word makes. But, a lot of the time that hint is actually wrong; the word isn't pronounced like that, it might be that it's similar to that (because the spoken language has shifted while the writing hasn't), sometimes is just completely different (the pronunciation component is there but it's shifted so much that it's not even similar anymore), and sometimes there's no component related to pronunciation.
It's certainly useful to see a character and be able to think "the word that might be pronounced 'qing' or something like it and means something related to language", but it's very different from being able to sound out words written with an alphabet.