Paul,
I don't know that I agree with your basic premise, but for purposes of furthering the discussion, two reasons might be considered.
The general geometric style of architecture in existence at the time
CBM's membership at GCGC which possessed sharp edged greens and bunkers throughout the course.
Another possible reason may have been the more dramatic influence of hard edged features.
I think the left front edge of the Redan 4th at NGLA and the back right edge of the Road hole 7th at NGLA might be good examples of the dramatic, unambiguous consequence of a failed shot that would encounter those features.