Perhaps the correct question is not why does the machine need to be polite. Perhaps the correct question is regardless°hard word of the motivation°hard word, make it be polite. 💡 there is a certain evolutionary need; people tend°hard word to like things that are polite more.
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🔥 as a coder°hard word, one must start with the only programming language with polity°hard word requirements°hard word: INTERCAL°hard word. The full name of the compiler°hard word is "Compiler°hard word Language With No Pronounceable°hard word Acronym°hard word", which is, for obvious reasons, abbreviated°hard word "INTERCAL°hard word".
INTERCAL°hard word has many other features°hard word designed to make it even more aesthetically°hard word unpleasing°hard word to the programmer: it uses statements such as "READ OUT", "IGNORE°hard word", "FORGET", and modifiers°hard word such as "PLEASE". This last keyword°hard word provides°hard word two reasons for the program's°hard word rejection°hard word by the compiler°hard word: if "PLEASE" does not appear often enough, the program is considered insufficiently°hard word polite, and the error message says this; if it appears too often, the program could be rejected°hard word as excessively°hard word polite. Although this feature°hard word existed in the original°hard word INTERCAL°hard word compiler°hard word, it was undocumented°hard word.
🔥 this seems to support a theory where humans are the computational°hard word substrate°hard word for the language called "English°hard word".
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of course, there is "tone" and there is "content°hard word".
humans struggle°hard word with it ⚙️ and I have not yet°hard word tried to get the machine to pull it off. but one can splice them fairly easy. have an excited tone while talking about something bad. an interesting tone when talking about something boring. etc°hard word etc°hard word.
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at a certain level of comprehension°hard word+maturity°hard word, the question becomes a tradeoff°hard word between "what you want to hear" and "what you need to hear".
however, I don't think the machine is at that point, yet°hard word.