I've heard knots called "an orderly tangle of lines". While that might be true, the knowledge of a few useful knots is something that is highly useful. You never know when you're going to have to tie down that thing you just purchased from the big box store on your trailer, for example. Or tie down a tarp over a hole in your roof after a tree lands on your house in a storm. Maybe you just need to tie a hammock between two trees to enjoy a lazy summer afternoon.
A guy can dream, can't he?
The Geek Prepper has an article with a link to some AMazon resources if you feel the urge to spend, and a nice printable card with useful basic knots on it if you don't. Unfortunately the card doesn't tell you what the knots are used for, so you have to figure that out yourself. Or you can look at this list of 10 of the most useful knots "that hunter should know". Or the 20 knots "that will keep you alive".
Just don't tie any grannies, OK?