As mentioned in the second reply comment here, the "your parents have money" comment is mistaken relative to many of the hackers reading this site. A lot of young hackers, it appears to me, are leveraging their parents' investment in their own education to move into occupations with high economic returns, after the parents didn't have the same opportunity in their generation.
On the other hand, "someday you will be like your parents" is a probable future that most people forget too readily, so the point is well taken that if you want to build a better world for yourself in the future, you might get a reality check on your plans by building a better world for your parents today.
I can't speak to the issue of what single parents need. I know I would dread having to use any current kind of dating site if (God forbid) my wife predeceased me. Health information is always popular here on Hacker News, even among the young participants, so it stands to reason that anything that can help people a generation older than you are keep good health must have wide appeal. Even in an era of steadily increasing life expectancy at all ages,
http://www.scientificamerican.com/article.cfm?id=longevity-w...
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2810516/
people still like to be healthier rather than sicker, and to live longer rather than die sooner.