What's wrong with wood?

There's an article on ESPN.com from last week about the new metal bats being used in college baseball that I just ran across today. It mentions how MLB scouts love them because power numbers aren't inflated by them the way they were with the old bats. It also notes that the decrease in power is changing strategies and will likely change recruiting. So, if all of these things are good, as the article implies, why didn't they just switch to wooden bats and get rid of metal altogether? Is the danger of broken bats that great?