My cousin, who has a business or finance degree, can't remember exactly, thinks a little bit along these lines.
He will have $100k in the bank and go buy a $50k car and finance most of it, because he'd rather have the money in the bank. Of course it's different when you have the liquidity to just go close the loan on a whim, and that strategy makes some sense to me if your money is growing faster than the loan interest. Most people, including myself, don't live in a situation to leverage that. Most people borrow because they don't have the cash.
I was stupid and got loans on things I didn't need and have since got rid of all except a vehicle loan that is almost the exact rate of my savings account. I can pay it off but it would take a decent portion of my cash so I choose not to in fear of the economy crashing.
There is a lot of good advice in here, but say I was just out of college I don't know that I could follow much of it. Fortunately I graduated 4 years ago and it was a much better time to buy a home/etc....