The real reason is an unhealthy interest in american life and celebrities, the BBCs rational for the coverage is of course total nonsense.
The public have a far greater interest in Cheryl Cole, so she is first item in the news yes?
This is how it works:
Desire to cover Tiger Woods apology for reasons unconnected with it's news relevance.
After the fact, find certain unusual aspects of Tiger Woods life.
Use those facts to justify the coverage even though they provide no actual justification for BBC News coverage.
It's the Chewbacca defence. It really is.