A few more gems from the same source;
“Hazards should be placed with an object, and none should be made which has not some influence on the line of play to the hole.”
“It is an important thing in golf to make holes look much more difficult than they really are. People get more pleasure in doing a hole which looks almost impossible, and yet is not so difficult as it appears.”
And then there is his description of his Lido design;
“There are five possible routes to the hole, and the choice of the player must vary from day to day, according to his length of drive, the state of the weather, etc.
It caters for all classes of players—even the absolute beginner can take No. 5 line. He loses strokes not by getting into bunkers, but by avoiding risks, and probably takes five, or at least four, to reach the green in consequence; nevertheless he enjoys his game, and not being disheartened, he improves, until finally he may be able to achieve the boldest line of all, and drive a fine ball straight to the hole.”
My take from that is that MacKenzie didn't shy away from having bunkers for the higher handicapper but the key for him was the player having options.
Niall