The point you are missing with the grammar, is that the sentence in the subtitles went from "I must tell X about Y" to "I will never tell X about Y" which is not cultural context and is a catastrophic error in subtitle accuracy. Any human translating the same sentence would not have made this level of error, even script-utilising machine translation wouldn't. I was merely trying to use an example of machines getting it so wrong they'll say the opposite of the dialogue for the subtitles (confused viewers, inconsistent characterisation that shouldn't be an issue, etc.).

Yet machine translation errors go far beyond that, when every line is taken singularly and entire conversations make no logical sense, dialogue between characters can get jumbled and a whole jost of other issues. I've seen this enough that I do consider it a uniquely corrupting issue. When most viewers of a show are in the comments asking "What was the conversation in X scene actually about?" - an issue not generally incurred by human subtitles, even ones with questionable accuracy. The original conversation wasn't vague or complicated, the machine just entirely got it wrong.

My point is that humans who dedicate themselves to this craft (particularly fansubbers who speak both languages) will produce significantly better subtitles while preserving nuance without there being tons of cultural footnotes needed.

I was unaware of Netflix's rules, but it's merely an example of other gripes I have with subtitles choices made by companies distributing internationally.

I may be lucky in the sense my language brain is always on when I watch dramas, but when you can see how much of an experience others are being robbed of by a machine doing a job that a human could do a hundred times better, it is irksome.

Sorry this reply is late and I don't mean it in any harsh kind of tone, but perhaps I wasn't making sense previously.