If JL really believes it was all about the goalkicking then he's completely clueless. 10.1 to 1.10 looks like it on paper, but almost all of Sydney’s goals were easy shots, whereas almost all of ours were tough chances.
You say almost all ours were tough chances, but the the set shots missed by Amiss, Jackson, Voss, Treacy and Frederick were all regulation for them. And some of the snaps (e.g. Switta and O'Meara) that didn't even score should have been goals.
Check out the twitter account @AFLxScore that looks at the expected score based on the statistical averages from where each shot was taken. It is often pretty close between expected and actual score. For Freo our biggest discrepancy before the Sydney game was minus 13. And most games within a couple of points.
We were minus 40 over the four quarters. I'm not sure where this sits historically, but it would have to be close to a record. At 3/4 time we should have been 8 points in front instead of 44 points behind. We were 24 from an expected 60, and Sydney were 68 from an expected 52. That's just ridiculous and a statistical anomaly that will likely never be repeated.
Sydney definitely had some easier shots, but our shot difficulty was more than good enough to result in a close game, and possibly sneak out a close win. I am a massive critic of JL, but statistics support that goal kicking was indeed the main defining factor of the game.