Why do people think they are going to get answers to personal issues from any social media?

If you are bullied, having bf/gf troubles, issues with bosses or parents, or even aches or pains, what makes people believe they are going to find answers from strangers through some form of social media? If you don’t know what to do about a poor relationship, it is an indication you should not be in any relationship. If you have some medical issue, the smart bet is go see a doctor. Do people actually believe that other people have their answers?