Does everyone think that perhaps the most unnerving thing for professionals and low handicaps is Mother Nature? In both golf course architecture, natural hazards, and weather conditions?
The oldest courses in the world where there is no discernable architect and where they still occasionally play major golf tournaments on, from the top of my head I can think of two TOC and TCC-Brookline (which I have far more experience on). I think what the pros hate is fitting their games into the natural and unpredictable surroundings. There was no person the routed the course through the natural features at TCC, just a couple of members that decided that their routing was the most scenic, easy to walk, and challenging they could find on the property. In fact, the reason they used the land they did there was because it was unfit for many other activities. For example, holes such as the Par-4 3rd and Par-5 11th are two which there is genuine strategy for both the average golfer and tour pro, which is mostly derived from having to manage two huge rock outcroppings on your tee ball and beyond. I think when there is no architect to say what is or is not fair for anyone, that is was the pros dislike the most.