Why should a fitness instructor/trainer have a good level of fitness?

why does he/she need a good level of fitness to be able to train others?Why should a fitness instructor/trainer have a good level of fitness?he or she needs to have a good level of fitness so he or she can demonstrate what needs to be done. plus if you have a good level of fitness it encourages ppl to work well. sets the goals. + could you see jhony vegas doing a fitness videoWhy should a fitness instructor/trainer have a good level of fitness?Everyone seems to be talking about Tony Horton's P90X program. It sounds like it might be legit.