It seems to me that the type of hunt and location can dictate the type of client you receive.
IF I said I wanted world record animals or else and we were shooting on managed high fence areas, I've already told you everything you need to know about my goals and you are required to honor those expectations. As a PH you're then combing the high fence areas to determine which managed areas have bred the biggest trophy and you hopefully are selecting the smallest possible fenced areas to insure finding those desired trophies. Everything about the aforementioned is transparent as to the whims and vices of the client and the type of outfitter you need to be to supply that demand. I'd also think that the vices and pejorative comments about clients and PHs on such hunts all have merit because all sides probably deserve each other.
On the other hand, if a client is going for an experience and if they want fair chase and best effort, they will accept victory or defeat as it comes with head held high and there will be no hard feelings. Best effort could be established by vetting the PH to satisfy the notion they have provided shooting opportunities on amazing trophies in the same areas in the past. Any reasonable client will be aware that "past performance is no indication of future results".
In summary: bad hunters go together with bad PHs. The PH has to scare away clients that are ill suited for wild hunts and find clients that are interested in adventure, experience and MAYBE that shot of a lifetime. Incidentally, a bad PH may just be a good guy that needs bookings and puts up with bad clients with poor morals....tolerance makes them culpable.
To the original story, it should have gone this way: "Sir, we are at a crossroads. You can take this rifle and we can dispatch that amazing animal, you can hold your head high and we can seek out more experiences on this hunt, OR I will dispatch this animal and we can end our relationship at the end of this day together. You will have to live with your ethics in this moment for the rest of your days."
Shame would have probably brought this guy back into the fold and had it not, the PH needed to jettison this person before their reputation was impugned. The PH becomes culpable by accommodating a terrible client.