But Tom, he did compete in those years. You went to the NWGA site. On it it lists him as the PNGA Men’s Amateur Champion 1915, 1920, 1923, 1925 & 1932 and a finalist in 1914 & 1921.
This was not just a local tournament, but one of national significance. In 1925, Golf Illustrated listed it as a "Major" amateur event.
He also won the California State Championship in 1926 & was a finalist in 1928
He played in the Western Open in 1927 & may have done so in others (need to look it up). The New York Times even has a short article about his losing a match back in 1915 and did a nice article titled "The Apple Farmer from Oregon" in th early 30's where his history was discussed (Need to find that as well.)
I too think that travel may have been an issue for him during those years, so he mostly competed locally. Yet it appears, at least in the examples of the Western Open and Pacific Northwest Open championships that these did have a national significance. Since they are "Opens" his status as a professional because of being an architect would have no bearing as well.
By the way, he was granted his divorce inSeptember of 1916.