This is the phrase network marketers should fear more than any other. If what you are doing is not, or does not appear to be, duplicatable, you are in trouble.
Fortunately, this is an easy one to overcome. As a matter of fact, if you are aware of this potential problem, you can be sure, in advance, that people will not have this objection.
Just ensure them that anyone can do it with the right coaching and mentoring, and then offer it to them. If you want such mentoring and coaching, click the "Mentoring Resources" tab at the top of this page.
Another way to reassure your prospects is to borrow a line from one of my mentors, Michael Dloehy. "I will believe in you until you believe in yourself."