Yeah, emphasis on the bolded. Having a small reach as a defenseman is always going to be a problem in the NHL. No amount of IQ or athleticism can remedy that.
As you said, if the IQ and skating is elite, of course Hutson could have a beneficial role on the team. But being a top pairing heavy minute D in the NHL is mostly impossible if you are under 6'+ . Defending efficiently along the boards, or just managing gap control with short arms/legs and a shorter stick is just impossible to compensate for.