Understanding Blockchain Layers: A Simplified Explanation

Blockchain layers are IMPOSSIBLE to understand? Are they, though?

Imagine that you’re building a house.
First of all, you need to make a foundation.
Example: protocols that link multiple blockchains. They are the foundation that allows further growth. That’s layer 0.
Then you’re working on the 1st floor of the house. You make it independent by applying specific logic of how it works. You define what services your project will provide. That’s layer 1.
Now you’re building the 2nd floor. When it’s finished, your house will be more spacious, you’ll be able to add more stuff into it. In a blockchain, layer 2 optimizes layer 1 by offloading its tasks. It concentrates on specific functions and allows layer 1 to run faster. That’s layer 2.
Now you gotta work on the interior. It makes the whole project more user-friendly, allowing users to interact conveniently with the blockchain. That’s layer 3.

So, would you say that blockchain layers are IMPOSSIBLE to understand?