Pretty much the response I expected. So what I am gleaning from your response is that you have no experience base from which to draw your conclusions, you have not had the more than 100 days in constant company of PHs and you have never been to Africa hunting.
I will endeavor to civilly enlighten you as to PHs and how they think from my experience.
Hunting is a job for them, it is how they make their living and it is all based on disposable income from the client. They work very hard to fill your wish list in the time allotted and in most cases there is more list than time. ANY impedament reduces their likelyhood of being successful in this goal and they view a single shot rifle as just such an impedament. Follow up shots are the rule in Africa not the exception, even on well placed hits. I don't care who you are a bolt is quicker to reload and get back into the action than a Ruger #1, this will cause delayed follow up shots and conceivably lost animals. This is a PHs second worst nightmare (losing clients is their first) as you get to pay whether you recover the animal or not and this usually strains the PH/client relationship and affects the tip. If they don't get you all or most of your wish list you can bet this will be reflected in the tip as well, which they rely on for some of their annual income. It is NEVER the clients fault and it is always blamed on the PH, this has made them very cut and dried about such things as single shot rifles, experimental bullets, odd ball wildcats and the like. They view them as a potential loss of income to them. It also damages the potential of repeat business it things go badly and animals are lost, regardless of fault. They want you to show up with a good reliable bolt action rifle, showing some use (brand new rifles scare them as well) in a good 30-06 or bigger as long as you can shoot it well, shoot a bunch of animals, give them a big tip and then go home so they can get on to the next client.
If you were working with a client and he showed up to the jobsite with tools you felt were not adequte for the task and you knew in the end you would get blamed for ANY shortfall on that job and as such it would be reflected in what you got paid, how would you feel?
This is what I have learned in my 100 and some odd days and evenings in the company of Professional Hunters.