Your kicker makes a 46-yard FG earlier in the game like it was nothing. From the ~5-yard line, you don't trust him to make another.
I think they were right to go for it. Figured if Seahawks were going to march down the field, they'd likely make the 2-point conversion (I'm aware they didn't, but considering they didn't need to makes the scenario different).
Blame the playcall on 4th & inches. Should be a QB sneak every time.