Sometimes 3 singles is *better* than a homerun. Often you'll get two runs out of three singles rather than only one (assuming the bases were empty). Also, 3 singles wears the pitcher out more than one bomb.
Brad Lidge would disagree. He was pretty worn out after one pitch. Plus you should always take one run over the chance for three runs. The next pitch after the 3 singles could be a game ending HIDP. The runner could get thrown out at the plate. The "worn out" pitcher could be replaced by a lights out reliever after the third single. Bottom line, always take the points.
Well, if we're cherry-picking historic examples... But most of the time pitchers have the mental fortitude to overcome a bomb (and, most of the time, that bomb doesn't delay clinching a WS berth). I was speaking statistically, not strategically. But, if you're going to lecture me on strategy, consider the merit of swinging for the fences as opposed to swinging for contact and quality at-bats.