Goosey
.
Two things, you'd be forced to lean back and the pulley is down at it's lowest position not up high like a face pull.
My main concern about all that would be the what’s going on around the knee joint.
in that the force of resistance is pulling away maximally at a critical point causing pretty bad shear force.
straight line resistance is not optimal for a hinge especially when the maximum amount of force is applied to a point where joint integrity is weak.