For one thing he isn't pushing OO. He isn't tying the idea of an abstract data type to a huge amount of structure, and then using it to sell a bunch of design patterns. He is trying to make a point about the value of abstraction and modularity.
For another, he elsewhere suggests using table lookups as another useful abstraction technique. :-)
As for your looking at things with tables, yes, Edgar F. Codd was a genius. His relational databases are a beautiful way to organize data into components such that people can combine, organize and extract it on the fly in very useful ways.
It is not, however, a good way to rewrite OO. For a start the abstraction that is OO is applied to itself recursively. (You build abstraction layers on abstraction layers.) This kind of recursive abstraction is something that relational databases are bad at expressing (see the complications with keeping hierarchical structures in relational databases) and while you can rewrite any particular example in a table structure, in so doing you lose sight of this central key fact.
What that means on a practical level is that you are unable to see or follow any of the transformations that make up modification and code reuse in OO. Yes, you can do both the starting and the finishing version. But you can't see how simple the change was for what it did. You can't see it as simple, and you can't see how you would do it. You are thinking relationally, and relational thinking simply sucks when it comes to modelling layering abstraction layers on top of each other. (Because that is a hierarchical action, and relational databases don't model nested hierarchies very well.)
That is when the examples are simple. When they get complex, you might as well be dealing with people who are speaking Greek. No matter how easy they seem to find understanding each other, you can't understand any of them. It just sounds like incoherent babbling. And it will continue to sound that way until you stop having to mentally translate everything to and from a language in which the basic concepts simply cannot be stated.
Cheers,
Ben