We played Lahinch hours after arriving in Shannon a few years back on what was probably an average weather day in the summer. My companion, a decent golfer with a deceptively keen short game, proceeded to lose over 30 balls and started mumbling below his breath that retirement from the game was indicated. Needless to say, this was an auspicious beginning to a long trek through Ireland where we experienced more rain and wind through 12 days than I had over many, many years.
I enjoy Lahinch. In better conditions- course, weather, and personal- I might be even able to post a decent score. And if I didn't know parkland courses such as the one JT chose to offer as a contrast, perhaps I would look down derisively at this genre. But I play a large variety of courses in different geographies and help officiate competitions of mostly high levels of skill, and only on this site would there be a decided preference for the Lahinches of the world over the TPCs of MN. And that's OK, golf is a Big World (God, do I miss Tom Paul!).
No doubt that site selection is important. But perhaps staying within the practical and possible is more meaningful in the analysis. E.g. tying into the current thread on Trump Balmedie, could/would Lahinch be built today? Maybe some of the classics we revere are so highly esteemed because they are forbidden fruit. I don't know how much of the dune was cleared to the left to create the driving area of Cypress Point's #8, or whether the famous #16 could be sited on the promontory. #4-10, 17, 18 at Pebble Beach? Different times, different possibilities. I have thought that the Links at Spanish Bay gets a bad rap because it is compared to PB though what could be done at the latter from a political/regulatory standpoint was light years more permissive.
Me, I argue that today's hand of man, given the many limitations placed upon it, does just fine. The art and science of gca and construction are at a high historical point, IMO. The availability of great buildable sites near large population centers and the astronomical opportunity costs limit greatly the ability for these highly capable men to shine. IMO2, Mother Nature without a bit of help is highly overrated.