No. Thats not what they said at all, you can choose to infer meaning, or actually read what they wrote. Which was that it is NO excuse for cheating. Their entire post was obviously centered around OP not feeling inadequate or lacking. It was clear it was put in as a possible reason for this man cheating, reasons are not excuses. And the man is still absolutely at fault. It was important to say this because many people in OPs shoes would feel like they where part of the problem or feel insecure.