Some people don't understand OOP, sure. That's the nature of things. However, many of us do understand. Consequently, nothing here comes as a surprise. And yet, we still think OOP has drawbacks where it's often applied, even if it has benefits in other applications. If nothing else, one benefit is that it helps us organize code segments and reason about function dispatch. One drawback is that it's not well-suited where it's often applied. This is the well-known "impedence mismatch." When that happens, it's worth asking if there are other ways to organize code segments and reason about function dispatch, which are better-suited so they don't experience these drawbacks. There are. Database constraints are one. Database triggers are another. They're not the only ones and they're not perfect, but then neither is OOP, and at least they have the virtue of being mated to the underlying data model perfectly.

Therefore, before we rush to say that other people don't understand OOP, perhaps we should consider the possibility that WE don't understand OOP if we insist on applying it where it doesn't apply.