They just don't stack up vs the other positions. I will be very surprised if they take center there and in fact if they do there's a good chance they end up wishing they took multiple other options.
That pick is prime real estate for the Rams. They have to get a round 1 talent there. Someone who is high on their board. It will be there and hitting big on a high end talent will make up for that lack of a top pick. I am certain there will be a top OLB, CB, ILB, or OT there. BPA will probably be RB but we don't need that.