If he loses the close-out game, the team still has two more chances to get one win. If he loses the elimination game, the season is over.
I don't know, you tell me what the higher pressure situation is.
Why do you keep preaching experience and swearing that that is what Buchholz will need to ever be successful, and then are loathe to every single chance to give him this experience? If he pitches the 0-2 game and fails, oh well. There's many, many more chances after this season, and its probably good that Buchholz experiences playoff failure. Has to happen at some point.