I'd remove or merge it with the Note field, if we have to copy and paste stuff from Wikipedia. I like and respect them Wikipedia, and occasionally refer to them even during my submission, but for whatever reason I don't like a complete outsourcing to other websites. Just my opinion. If it's SEMO or such I'd say otherwise.
The biography fields are definitely underused, and perhaps we don't need them that much, in the first place - with little submission in 7 years, it's apparent.
My opinion remain the same.