People love generalizations. That’s why twitter is so successful. You cannot elaborate and cover all the exceptions to be specific and real. Most of the statements are made in generic manner and most of the causal readers love reading stuff that makes sense in general and does not require additional thinking from their end.
Talking in generalizations and being generic is easy and safe. It does not require to use mental resources to either write generic stuff or to read it. Many people by default choose easy route and hence many people are casual receivers of information from media and online. We choose not to ask for specifics and go into details on any subject matter because we want to feel safe without questioning the authority. If we question the authority then it might lead to more questions and further distrust which makes us feel more out of control. So generally we love to feel that we are in control even though a lot is not in our control. So we compensate our lack of control with behaviours which gives us the feeling of autonomy for that moment.
*Do read the Disclaimer