I think you need to temper that a bit. I agree that he's a rookie and therefore it's premature to throw in the towel on him...but...lots of other rookies (Lashoff and Dekeyser for instance) manage to go game to game without being noticeably terrible at protecting the puck or maintaining zone coverages. Smith is bad at both...even for a rookie.
The guy you were responding to is wrong for thinking that Smith's deficiencies doom him to a awful career, likewise you're wrong for insinuating that his being a rookie excuses him from having to play responsible defense.
True, I was a bit hard on the guy, but its not like a hockey forum is a place for careful critical thinking and rational arguments. You sir are a gentleman and scholar while I was... less so. Still, Smith is the last player I am pinning my hopes on for this team.