Everyone has different sensitivity to sound. Congratulations to those who think it is not noisy, but others are really disturbed by it. You can ignore it, but you can't say that others are busy and demanding. Civilized society is tolerant of different people. For example, you can't say why disabled people are so troublesome, but you should also build all kinds of barrier-free facilities for them. At the same time, you are not bothered by this matter, but there is no guarantee that you will not be bothered by other problems. Don't you want others to tolerate you then? Everyone understands each other, would you please implement it? Second, everyone is engaged in a different job. Students who need a mouse and keyboard to handle their work may have no feelings for those who also use the mouse and keyboard, but it is not difficult to understand that students who need a quiet environment to learn to think will be disturbed by the sound of the mouse.