Searching for data is fun. Reminds me of doing puzzles, wich I'm a fan of.
Model is a simplified view of reality that captures most important aspects. How acurate it is depends on the artist, ehm, architect.
If something looks to simple, you might be missing some important parts.
In the case above, knowing tables and columns in your data model is very important. But what this guy is missing are relationships. No model is complete without it.