Why does the Internet give license to all to ask the most intimate of Qs of strangers and the willingness of?

There is a reason a psychiatrist has you lay on a couch then make himself invisible. Some even sit behind a curtain or turn out the lights. It is kinda like talking to yourself. Of course you trust the doc is not gonna do anything harmful with the info you divulge. The Internet is different, everything you type get saved some where. There are few quarantines of privacy. Personally I will not divulge personal information. I recommend others do the same.