Wow, is this ever the ultimate representation of an apples to oranges comparison. Up 2-0...NOT 1-0, but 2-0....HUUUUUUUUGE difference. When you're up 1-0, anything can cost you the win. One stumble by a defender, one good individual play, one nice cross, a won corner...anything. Sure, if you're a minnow and you somehow manage to eke out a fluky goal, you bunker...you certainly don't bunker in any other case...it's just plain asking for trouble. Up 2-0? Well, you certainly don't want to just bunker--that's for minnows only, IMO--but you pull back and play a defensive game, with the threat of a counterstrike. You might concede a goal for lack of offensive pressure, but then you still have the lead.
No, I don't hate it when teams run the ball in the 4th quarter...because it is a low-risk proposition. What are the chances a team is going to cause a fumble, pick it up, and run it down the field? It also has other benefits--not stopping the clock, not tempting fate with possible interceptions or sacks. It has absolutely zero comparability to bunkering in soccer.