What is the meaning of "bunt"?

I was reading about advertiser David Ogilvy, and at some point he gives the following advice:

Don't bunt. Aim out of the park. Aim for the company of immortals.

What is he referring to? I looked up the word bunt, but all I could find is related to a baseball technique.

A bunt in baseball is a gentle tap of the ball that causes the opposing team to scramble from their usual positions (catcher and pitcher in particular). Its goal is to get the hitter to a single base or move other runners to the next base.

It is in stark contrast to a big swing, an effort to hit the ball out of the park (home run).

By analogy, a bunt in the rest of life is a meager small effort rather than a strong bold move.

(No disrespect to the bunt, which often has tactical and strategic importance.)