Does that mean zero doors and zero wheels? Because a jet ski is surely a vehicle, right, and it has zero wheels and zero doors.
Likewise, what about a cable car (aerial lift)? It has doors (maybe), but probably not an internal engine. It's definitely a vehicle, but it has almost nothing that's similar about it compared to the car (automobile) you described earlier. If it where a class, the "vehicle class" could really only meaningfully have some attributes related to transport (like human/cargo capacity) and some methods around movement in the most general sense. If we keep breaking this down, we'll find a huge taxonomical network, a vast sea of interlocking Venn-diagrams of attributes and capabilities. This is the corner that those OOP tutorials force people into: trying to turn a network into a tree, and it doesn't ever really work (at least not without awkward compromises).
Sure, for a beginner who's never grappled with trying to map concepts to things, this can be a nice contained way to start. Eventually though, that beginner will need to learn some the next levels of more general thinking; e.g. one where they can start modeling interfaces/protocols and their relationships.
Except even in game design it's a bad idea once you get more than a handful of entity types. https://gameprogrammingpatterns.com/type-object.html
https://en.m.wikipedia.org/wiki/Reliant_Robin
https://en.m.wikipedia.org/wiki/Piaggio_MP3
What shall we do with them in our class hierarchy?
Yeah. Exactly. Which is why Dog extends Animal. It has a set of common features (code/behaviors, and data like number of legs, amount of fur, and so on). It is a really good analogy and a really good point to give someone an idea of why you would use inheritance. It requires absolutely no programming knowledge, and best of all, it's not difficult to imagine cases where you might actually use it. c.f. basically any game with dogs in it where they're a subclass of NPCs.
And the same for Car extends Vehicle. A vehicle can have any number of wheels and any number of doors. A car can have any number of doors but it always has 4 wheels. All cars move in approximately the same way, while vehicles can articulate or skid-steer or ...
Just because something is simplified does not mean it has no value. And just because *you* would not use these designs in *your* life does not mean others wouldn't. As TFA says: "unless they are talking about writing a clone of The Sims".