Always fun when they manage to categorize it wrong 3 times in a row.
One of the hardest parts of my job is trying to convince people where the pool of blood on the floor is coming from. We are forever stitching up the wrong wounds and missing others entirely.
Pain sneaks up on people and they often don't realize they're in pain until someone takes it away. This is probably why Refactoring is one of my favorite tech books. It's a set of tools and justifications for chipping away at that pain bit by bit, instead of tolerating more and more while productivity grinds to a halt.
At the end of the day, if only three people really have to care about a thing and they're fine with it, is it their business to run the project the way they prefer/tolerate? It does matter if the opportunity costs and externalities are affecting other projects. If they don't have time to work on other features because of the mistakes they never correct. If other people's flow is constantly interrupted trying to work around their quirky stuff. But if we don't see any of that, or only rarely, then it's more that my internal architect trying to be bossy rather than lift all boats.