It's not that simple. Let's say you memorized the main meanings of all characters in a Simplified Chinese character dictionary - each sentence you read will feel as if you've understand the verbs and very basic nouns in the sentence, but the way they're connected to each other would be quite a wild guess.
For instance, rewriting your sentence above into something somewhat like this:
I finish wonder this; accept word element character language, you not think word ability read language.
Hardly readable once you start getting long sentences in books. Japanese speakers can't just natively go ahead read and understand 95% of a Mandarin book even if they know all the Simplified/Traditional Chinese characters which are not commonly used in Japanese. They can sometimes understand simple sentences, and can more easily understand, say, street signs.