Is this perhaps more of a stance you'll see from fringe case healer mains that are somewhere between Extreme and Savage in terms of regular progression?
My person experience over the years is mostly akin to Rein. Even the most stubborn set in their way healer mains will usually have a second pick. Generally, the more hardcore you go, the more flexible you get to the point where you end up with monsters that can jump on just about any viable job and prog/clear anything with it.