Chinese textbooks for University quantum physics are written in Chinese. They don't like, switch to English after high school or something. And they do in fact do brain surgeries and fly manned rockets. The language is obviously fine as it is.
The likely core of the problem you had encountered is that, languages are algorithms of thoughts, contrary to whatever Chomsky guy might have told you, and a language is only coherent within itself, and you weren't aware of that. A piece of Chinese text taken out of context and words displaced with that English used in similar manners, don't necessarily make sense. Rest assured you'd be far from alone with conflating lack of coherency of someone not from US trying to speak English with their lack of IQ, that's a common sight, but that doesn't mean a language you don't speak is inferior to yours.
Chinese is different, more contextual and metaphorical, requiring more 'fuzzy' linguistics to say the same thing.
Thats its... thats all. And I challenge anyone who works across china and US like I do to not agree. Beyond that you're just going off on your own made up missions of stupidity. Really re-read your train of thought and think about how wandering nonsense it becomes with assumed things I didn't say.
Was that Chinese text actually being ambiguous, or was that translations you were given being borderline nonsensical/error-prone? The latter is kind of an expected behavior, and that has nothing to do with whether Chinese are illogical bunches(why even bother if so...)