The problem with "everything is an object" it doesn't tell you a great deal off the bat. It's like saying "everything is a thing". Sure, it's true but it's not helpful.
In your "companies are just a special kind of employee" example well if that is true within your data model then that is quite interesting and contributes to the listeners understanding of how things work. The alternative "companies are a just a special kind of entity" is less useful.
In your "companies are just a special kind of employee" example well if that is true within your data model then that is quite interesting and contributes to the listeners understanding of how things work. The alternative "companies are a just a special kind of entity" is less useful.