From a statistical standpoint: GIDP's have a lower correlation with winning percentage, at least over the last half-century, than strikeouts. GIDP's correlation with winning percentage, on a team-by-team basis between 1956 and 2005, of -.039. Strikeouts by batters have a correlation of -.103. All outs by batters (at bats less hits, plus sacrifices, caught stealing and GIDP's) have a -.046 correlation. For the statistically challenged: correlation is a really fancy measure of how well two groups of similar statistics (like, for example, runs and wins) "match up" with each other. This measure, called a "correlation coefficient", is a number between 1 and -1. The closer the number is to either 1 or -1, the higher the correlation between the two sets of data. The closer the number is to zero, the less correlated the two sets of data are. For example, doubles have a higher correlation to winning percentage (.187) than triples (.073) over the last 50 years. On-Base percentage has the best correlation with winning percentage during that time frame (.485). Back to the discussion: a groundout is only about half as bad as a strikeout when you view it in terms of the ultimate goal - winning. That should be intuitive, as has been pointed out earlier - more things can happen if you put the ball in play, as opposed to not doing so.