Why sum the force curve and ignore the activation point? In an extreme example, if it activates at 0.1 and the force required increases 10 fold at 0.2, the the

Why sum the force curve and ignore the activation point? In an extreme example, if it activates at 0.1 and the force required increases 10 fold at 0.2, the the force from 0.2…4.0 obviously doesn’t matter (because the user would feel the force increase and stop pressing).