I think many “old skool” farriers were used used to the fact that there was often always someone around the barn to hold a horse, so they just kind of showed up when it was convenient. Also, with many professions (like riding instructors and doctors) where there are often legit reasons to be late, being late and not keeping appointments becomes a habit.
If you don’t show up on time for an office job because of “traffic,” often you’ll get fired because your boss will say, “it’s time you realized you have to leave earlier.” But if someone does a good job, often people will just expect they will wait hours at the barn (or a doctor’s waiting room), because it’s not every day, and they’re worried about the alternatives.
I often have the same issues with contractors coming to my house who are “old skool.” Like, there’s a guy I love, but I kind of hold off on hiring him unless I can’t find anyone else. He’s inexpensive and highly skilled, but he doesn’t have a smartphone, and will just sort of randomly show up when he feels like it to do an estimate and tells me the day before he will start work. Sometimes, he’ll stop by and leave a very hurt message on my voice mail, “I stopped by but you weren’t home,” like it’s a shock a woman has stuff to do rather than, say, doing laundry on Monday. He’s great, but communication leaves something to be desired.
I do know some middle-aged men, though, who have a similar allergy to timely written communication. It’s like, we live in a wonderful world of texting. If you’re going to be late, please text. I won’t be annoying and send you a million messages and if someone does, ignore that person. But at least let them know so they don’t lose the day.