They're already participating in golf. Their hard goods brand failed for a few reasons. Being built from the ground up, poor economy, less than stellar sales. It was hard for them to compete with the likes of taylormade which if I remember correctly may have been the biggest equipment OEM at the time. If they can buy and turn a profit I don't see why they would care. I think if it helped solidify their soft goods products it would be a great investment for them. But, that's just my thoughts. Like you, I really don't have any insight into Nikes business decisions.
I think the biggest reason they dialed was because non golf people were dictating what their amazing r&d team could do/put out.
they had an all star team and Nike messed it up by trying to control too much instead of letting golf peopledo the golf thing.