A true professional knows when to make tough decisions. Go for the jugular and attempt a quick kill and catch razor sharp tusks? Potentially get maimed, blinded or worse, putting him out of work for the foreseeable future or killing him.
Go for the brachial artery instead and hang on for a bleed out. Time consuming yes, but safe. Maybe he knows the area, knows there arent too many threats to snatch his kill around this time of the day. Can't be afraid of the sloppy kill if you want to survive... not every day at the office is going to be an easy one.