In the process of tracing my family tree, I have been surprised by those who are unconcerned about their family history. I believe that everyones family history is important regardless of where they were from or what their station in life was. Your ancestors are YOUR history, please see that they are remembered. A family of four, may have four different spellings for their last name. A lot of mistakes are made when people transcribe records.
Eligible handwriting is one reason.
There will also be some instances of misnumbering, as well as mis-statements of gender. My grandfather was Levi Volentine, yet his father was Thomas Valentine.