It's also true that most of your friends have more friends than you do.
The law of large groups is at work here. This explains why the people you see at the gym tend to be in better shape than you are.
People with lots of friends are more likely to be friends with you than people with no friends, right? And the people who are at the gym a lot (as in the people you see the most often) tend to be in better shape because they show up more often.
Discernment is the hardest part of marketing–seeing the world as it is, instead of how you experience it.