Ben,
The reason I started this thread was to identify individual pet hates, based very much on your initial distaste for three threes on the same orientation.
The reason it classifies as a pet hate is because it seems very high on your list of don’t’s whilst it is a much lower consideration on many other architect’s priorities.
As you should know more than most, there is no such thing as a perfect golf course for all people. Similarly, there is no such thing as a routing that every person who plays golf will consider “perfect”. Every decision in routing has multiple knock-on effects, some beneficial and others that might be considered a compromise. You can’t just pick a piece of land and design the 18 best holes in a silo, disregarding all other holes. You would end up with crossing fairways, greens that don’t connect to tees, and countless other unacceptable compromises. As you also know, it’s uncanny how often you end up with 17 or 19 holes in early attempts at stick routings.
I suspect that - at St Patricks anyway - three threes in the same direction was so far down Tom’s list as a compromise that he barely realised it. If you barely realise something, it’s usually pretty easy to move on from it when you eventually do. The orientation really has very little to do with whether they play alike or not. As Sean correctly stated earlier, the bigger similarity is the way that 5 and 17 promote a kick-in shot from the right.
In other words, there may be no constructive discussion to be had; because it took up so little brain space in among the thousands of other decisions that needed to be made by the design team.