The only advantage I see to the cat vs. just driving down the street with the same stuff in your car, is that cats routinely go in back yards and so on without anyone’s notice or complaint. But then, what’s the point of being able to catalog a network because your cat can go somewhere you can’t. How will you use that information in any useful way?
Because....
You ..
Cat - a - log
It.
I’m assuming because certain OS’ don’t natively come with apps to locate wifi nodes, and you need a bit of help locating them.
Plus, it can help you locate some of the weaker-signaled ones that you can then target with a directional antenna.