You're only saying the play call at the half wasn't bad because it worked out. What if it hadn't worked out? Is it still a good call then?
Just because a play call works out doesn't make it a good call. Likewise, just because a play call doesn't work out make it a bad call.
Edited to add: What if the interception near the end of the game would have been a Seahawks TD instead? Is it still a bad play call then or a good play call? I'm confused how you distinguish between the two???