The simple answer is that Williams, for all his prowess on the bags of, particularly, Tiger Woods, and latterly Adam Scott, which has produced 14 major victories, should not be there.
The Hall, you would have thought, should be the preserve of players. They drive, chip and putt to the lowest score. The pressure is on them; the kudos, or flak if they stuff up, belongs to them.
Williams has earned significant respect for his ability to assist his boss in clutch situations, most recently making a decisive read on Scott's Masters-winning put at Augusta last year.
The selection process is that an individual must receive 75 per cent support from the selection commission. There are 25 members who fall into the lifetime achievement category.
They include a former American president, George H.W. Bush - good luck working that out - and also includes coaches, designers, administrators and, heavens above, broadcasters and writers, including Charles Darwin's grandson.
And that's the point.
Having opened the door to "outsiders", it would seem churlish to shut it on Williams.
Sure, his manner can be abrupt. He's had bad public pronouncement days. At times he's scowled his way around courses like a bear with a pounding headache. He hasn't gone about courting friends and it may be that's coming back to bite him.
But is that enough to red card him?
Funny thing is, as Williams heads for the finish line in a stellar, and lucrative career, he probably couldn't care less.