It wasn't crazy, we've seen nothing from Gallagher to suggest he is Premier League standard, yet. Long didn't miss those chances because he was afraid, he missed them because he's Shane Long and that's what he's done his whole career.
As an aside, exactly 5 years ago we lost 1-0 away to Swindon and ended up in the drop zone, without a manager. We managed to avoid relegation so, I won't panic just yet. The goal scorer that day, a Mr Charles Austin.