This has to be true, during the design phase, but that is not to say that Aesthetics is not playing a vital role as well.
Where aesthetics comes into it's own during the field during construction. Once the bones of the course are laid out from the design plans then begins tbe aesthetic detail considerations.
The proportional scale, perspective perception, viewing corridors, flow of the shaping, degrees of visibility, relative sizes and fine positioning of bunkers and trees, shadow effects, etc, etc
There is a wide palette of important aesthetic decisions that go into enhancing a good "strategic and playable" golf course.
Which is why good golf course architects spend a lot of time in the field during construction with corresponding good results.
As Herbert Warren Wind once said:
"A golf course achitect must have the soul of an artist, the brain of an engineer, and the heart of a golfer"