RE:ATMs
Some people, like me, don't like carrying large amounts of cash through places we've never been before. Hitting an ATM 5 minutes from the guy's house is still 5 minutes more than Id want to have a couple hundred bucks cash on me. Also, my bank limits ATM withdraws to $500 /24hours so if I wanted to pick up something costing more than that, I'd have to carry the difference with me.
Re:2013 post
What you linked is about a credit card charge back, not a paypal gift issue. CC charge backs can happen on both gift and non gift paypal transfers; but gift transfers cannot be disputed through Paypal.