Fine. Replace "clients" with "passengers," if it makes you feel better. Perhaps you would be better served putting words in others mouths then, rather than letting them speak for themselves.
No, not fine at all.
Passengers and clients make very different demands. You need to understand how and why their demands are different and how this can impact on the management of the flight. I worry that you dont.
Jan makes a fair point, since few on here fly with "clients" but many with passengers; you should not replace one with the other.
Pace makes some very good observations as to why the demands of clients are often quite different from passengers and why the CAA and others make an important distinction in licensing between providing a service for remuneration and not.