That may be the crappiest statement I've seen on here. Why should a single player get shorted a hole that he paid for because he's by himself and faster than a group if the course is wide open in front of the group? If the course is packed, I'd agree, but if there's a hole open in front of the group, a single should always get to play through.
You must not play as a single much, because there's nothing worse than standing in the middle of the fairway watching four guys in carts hack it up in front of you and not even acknowledge your presence because you're a walking single. The old days of "Singles have no standing on the course" are over, even the PGA has acknowledged that.
But I am against sending singles out during peak times when the course is busy. They should be joined into groups during that time. But a guy trying to get in some exercise and walk 9 holes on a Tuesday evening before the course closes? Let him play through, after his first shot, you won't even see him again.
If a person wants to walk late in the day and get some exercise, what does it matter what 9 holes he plays? Play around them.
I play as a single a lot in those circumstances and, if there are openings on the course, that is where I go. I don't want to be playing through multiple groups any more than they want to stand around waiting for me to play through, especially late in the day when they may be trying to finish 18 holes. It's a matter of courtesy and convenience.
I also hook up with other singles and make groups when possible to make it more easy and convenient to keep pace with the rest of the course. Our head of outside operations knows where all the singles are on the course at any given time and tries to get them to play together.