Why? Because you can! And pickle, and jam, or otherwise celebrate the resurgence of the domestic arts our forebears held so dear. Put on your best apron and step into our kitchen, won't you?
If for no other reason, I think you should make this marmalade for the smell alone. Every time I walk past the jar I have to open the lid and smell it. It is not only marmalade, but aromatherapy too.