I am retired and my Hobby is Genealogy. I have researched my families for over 20 years. I decided I would add my families and furnish what information I could so that all of them would not be forgotten. I have a few friends I have added but most of the people I have memorials are family. If you work on a family tree you can see it's not just one family that makes your DNA it take a lot of people to make a Family.
If you do genealogy you will discover that just a Death Certificate alone doesn't tell you the whole picture. I have searched Court House Records, Census, Death Certificates and Cemeteries and Family Histories. The best information comes from paper trails of families mailed to me before everything went to the internet. I have a bag full of disk with lots of information.