Why is OOP lumped with Clean Code? Objects are useful for managing complex states and relationships. They are complementary, not mutually exclusive, to procedural and functional programming.

Usually when people refer to OOP they don't mean encapsulation, although that's the core tenant of OOP. Encapsulation, private and public etc is a given. Usually they're talking about the other OOP stuff, like inheritance. Inheritance is pretty much bad and is the wrong abstraction for 90% of stuff.

I think they meant "OOP patterns". Not that I agree with them