Craig,
Is anyone saying that? Like most topics on this site, there is no right answer, only opinions from different perspectives. How can anyone answer definitively that one hole is inherently better than another. Maybe sometimes the answer is obvious but on the whole, who knows? A hole that may be your favorite and that you think is outstanding, might be some other golfer's nightmare.
It is hard to define "inherently better". Even the question of what is harder to design is very subjective. There may or may not be a consensus that par five holes are the hardest to design. In my experience in remodeling golf courses, I think the easiest (in some cases but not all) are the par threes and I explained why. It is because you know where golfers will be playing their approach shots from. For par fours and par fives, we like to think we know where most shots will be played from but frankly that is often not the case unless we are designing for professional level golfers. We watch on TV the shot distribution profiles for pros and they are very consistent. Take a look at one for everyday players and it resembles nothing like that. I often look at where divots are in the fairways and shake my head at how they can literally be all over the place. And even on par threes; although we know where golfers are starting from, we really don't know what clubs they will be using. For example I played the other day in a match and on the one par three, one golfer hit a 4 hybrid, another hit a 6I, another hit a 7I and the fourth golfer hit an 8I. All four golfers were playing from the same tees and were similar level handicaps. How does an architect design for an approach shot with that much variety from the same tee? The guy who hit the 4 hybrid hit a low trajectory shot and the guy who hit the 8I hit this towering moon ball!
Getting back to what is inherently better - who knows? I go back to what I said early on, I personally happen to have some favorite holes that are par threes and par fives. There are a lot of par fours I love as well. I will leave it at that.