I agree that the message was out of place on the freeway. I saw the signage last Saturday on the 15 and 215. This picture is stolen from Reddit:
Riding I-5 past Pendleton is different since you’re on the shoulder and not ‘taking the lane’. And on streets where you should take the lane I prefer signage that says ‘Bikes May Use Full Lane’ over ‘Share The Road’ but that’s another topic…