The team's record in the shoot out, not just this year, Einstein, is supplementary evidence that the offence consists of a high degree of passers and second-line at best shooters. Correlate other teams' shoot out records - which may fluctuate from year to year, but does show which teams are more efficient shooting wise.
Well I was being fatuous, but still shootouts occur far less often than actual gameplay and sample size issues (ie. cases where a team has been lucky to win more often than the results would suggest) will be far likelier.
I decided to go take a look at a larger sample of shootout stats and you can't even get a decent sample without using a timeframe so large that it becomes difficult to draw conclusions about "this team" - take enough seasons into account and the roster turnover makes the value of conclusions about this or that team pretty questionable.
Over the 2011-12 and 2013 seasons the Canucks were actually smack dab in the middle of the road on shootouts, winning 13 and losing 13.
Furthermore their shooting percentage (18th) wasn't as much of a problem as their save percentage (22nd) which doesn't really support your argument at all. (Nevermind the fact that looking at the top career shooting percentages among players with 10 attempts or more includes some goal scorers but lots of others who aren't talented finishers like Frans Nielsen or David Desharnais or Jussi Jokinen or Mike Santorelli.)
Ironically, the Canucks have a far less "putrid" shootout record than either their shooting percentage or their save percentage would seem to result in.. probably due to an issue with the sample size.