That's a pretty ignorant statement. Have you ever played golf in Arizona? On desert courses, some of the holes can be 1/4 mile from green to next tee box. Plus the elevation changes. Plus the terrain, crossing desert washes that have jumping cholla and snakes. All this and 110 degree weather as well.
I like to walk too, but it isn't always feasible. And a lot of the courses here, you aren't allowed to walk. And I'm plenty athletic.
See the picture in my avatar.... go ahead and walk across that 150 yard carry to the fairway. Be sure and have hiking boots, heavy pants, and a first aid kit with you.