I'm pretty sure Tim McCarver is the guy who said a few years ago "A walk is just as good as a HR here", which is easily the dumbest thing I've ever heard a professional baseball analyst utter. Nothing that Joe Morgan, Rick Sutcliffe (in all his drunkeness) or anyone else has said can top that. He basically wiped his ass with the most elementary rules of baseball, math, and logic in front of millions of viewers.
IIRC, he said that when Foulke walked the leadoff batter in the bottom of the ninth of Game 6, with the Sox ahead by 2. And I'm not really sure where you're getting your ass-wiping rhetoric from, because he was basically correct. When facing a two-run deficit in a last at-bat situation, the trailing team needs one batter to reach base, and then another batter to reach base and score. Whether the first batter reaches via walk, HR, or whatever is almost entirely irrelevant - the only factor that makes the walk less valuable is the (relatively low) possibility of a subsequent GIDP. (We can assume that with the two-run deficit, there would be no sac bunting, base stealing, or other base-running tomfoolery in the case of the first runner.) So McCarver was guilty of - at most - a slight simplification. Had the deficit been significantly larger, it wouldn't even have been this, as runners on first almost always advance via defensive indifference anyway in this case, removing the GIDP possibility.
I used to find it annoying that McCarver brought up this line of reasoning so often - it seemed as if it would be completely obvious to any sentient observer. But as your post (and the lack of critical response to it through the rest of the thread) indicate, maybe that's not the case.
Finally, while he clearly used the word "good" as it pertained to the results of the situation, it's worth noting that had he used it as an evaluation of the efforts of the offensive team, his case becomes that much stronger. Leaving aside the result of the AB, a player who walks when leading off the last inning with a two-run deficit has very likely taken a better approach at the plate than one who hits a HR, given the situation.