Yup. You don't reduce your exposure because a team verbally tells you they may pick with one of the last selections in the first round.
That would be like Jim Harbaugh not recruiting another RB because a 5* verbally agrees to use an official visit on UM sometime after his season is over
The most logical answer is that what we're officially hearing is the truth --- Wilson has a quad injury and isn't playing in the 5-on-5 portion of the combine to guard against worse injury. What that does to his draft stock is a guessing game. But by being at the combine he can still participate in interviews, still get the official measurements, still take in the atmosphere, still hear the opinions first hand from NBA Execs.