jetBlue Hiring
In my experience some charter guys don't get the crew concept. And as a pure 121 guy, that post came across as pompous to me. When I was a recruiter I wouldn't have hired him if that were to shine through in the interview. If his customer service is so well suited to charter, he should stay there.
It's less about individual customer service in 121, sure. But there's definitely customer service as an airline, and if most pilots at an airline believe in the product and share common goals, the customer service comes through.