If aren't prepared to argue your point don't expect people to take you seriously. There are no lack of opinions on the Internet nor in the world. If you can't justify your own despite the ever larger resources available to do so chances are you are wrong. The reason why people on HN don't isn't because they don't have to, it's because they can't. That is why they are drawn to places where people agree with them so they can sit and "not understand what is happening" without facing their own ignorance.