The problem with this is practical use. I so rarely need to knot something securely or in a special way that it doesn't seem worth the time to learn. I can look things up if I find a use.
Someone close to me taught me how to square knot, so my hoodie-tied-around-my-waist would stop slipping, as I was using a double overhand knot before.
I'd also like to add that learning knots is honestly more of a 5-minute commitment to learn than a 1-hour commitment, but it's definitely still a commitment.
What practical uses do you use knots for?