Blackwood was so far to the other side of the net the puck going off the skate had nothing to do with that goal being scored. Rantanen could have missed the net and it not go in.
With some bad luck the puck could have went off the skate and went wide.
I guess you can argue Rantanen’s contact with him prevented him from getting across (it shouldn’t have been called back for goalie interference though) but that puck off the skate had little to do with that.
I nailed him on the first goal too, but it was a pretty good shot and not a terrible goal.