I'll offer up my three expert witnesses...
"It is more or less accepted fact that trees are not the best of hazards, for the obvious reason that they unfortunately afford but slight opportunity for the display of golfing skill in extricating the ball from their clutches…but they are undoubtedly charming features in a landscape view."
H.S. Colt
"Trees and shrubbery beautify the course, and natural growth should never be cut down if it is possible to save it; but he who insists on preserving a tree where it spoils a shot should have nothing to say about golf course construction."
George Thomas
“Trees should serve perhaps as the scenery, but never as part of the stage.”
Donald Ross