Pretty much everyone uses some knots in bondage. There’s a lot of preference in their choice and what’s the right knot depends on the circumstances.
I have an interest in knots; in service of the bondage.
I have an interest in rope; in service of the bondage.
I have an interest in many thing, in art, in music, in anything that helps to serve the bondage.
What I don’t understand is the obsession with these things just as a stand alone concept with no purpose other than to argue about the intrinsic benefits and properties of those knots divorced from their use.