Why do people use people when they mean one person? Or should that be "Why say people when you mean me?"
And I'm not assuming anything. I said, fairly clearly, that it looks like you are suggesting that they are not a good thing - you even use the word 'irrelevant'.
If you have such a problem with 'people' misunderstanding you then all I can suggest is that communication is how we get thoughts and ideas from one person's mind into that of another, and there are at least two minds involved in the process.