Carlos Gomez and (not) stealing bases

First, if somehow this post can be put down the page so we can have still see Tommy, Nando, and a station that gave Gilbert Gottfried an entire night to do whatever he wanted, on the top of the page, please do.

Next, Carlos Gomez. Correct me if I am wrong, but I thought the big plus to him was his ability to steal bases. Not Henderson/Coleman/Raines scary, but more than above average. I haven't been able to find what "average" is for a center fielder or someone like Gomez, but it seems like every time I watch him play, he gets caught. The above link has him 40 for 55 with the Twins. 73%, if I am reading this correctly. Is that a good percentage?

My point: If he can't steal bases almost at will, what's the point on having him.

Edit: Math is hard for me sometimes.