That is the point! When people earn decent wages, you tip little or nothing. It is the mandatory, guilt driven tipping culture that is wrong. Nothing stops you or anyone else from rewarding exceptional service. Ordinary, competent, but not exceptional service deserves fair wages by the employer. Not practical blackmail of customers to make up for the lack of compensation that should be paid by the employer.
And the question is, when the job description of Seabourn employees is to provide outstanding, attentive service to all (not just to you) and they are paid a better than decent wage for their job, should you tip? When exceptional service without flattery is the norm, is it exceptional?